論文

公開件数: 118 件
No. 掲載種別 単著・共著区分 タイトル 著者 誌名 出版者 巻号頁 出版日 ISSN DOI URL 概要
1 研究論文(学術雑誌)
共著
Preparation of catalyst for polymer electrolyte fuel cell using the Marimo-like carbon
Koki Baba, Mikka Nishitani-Gamo, Toshihiro Ando, Mika Eguchi
Transactions of the Materials Research Society of Japan

42/ 2, 51-56
2017



We have investigated the influence of the concentrations of both the chloroplatinic acid and sodium borohydride solution on the formation of the Pt nanoparticles in this study.A lower chloroplatinic acid concentration and higher sodium borohydride concentration produced fine Pt particles with higher dispersion and better catalytic activity than other.
2 研究論文(学術雑誌)
共著
Gas-leak-induced pinhole formation at polymer electrolyte membrane fuel cell electrode edges
Hiroyuki Gunji, Mika Eguchi, Fumiaki Sekine, Yasuyuki Tsutsumi
International Journal of Hydrogen Energy

42/ 1, 562-574
2017/01/05



Pinhole formation in the membrane is a polymer electrolyte membrane fuel cell (PEMFC) failure mode typically due to mechanical causes. This study reports the discovery of thermal pinhole formation caused by a gas leak.
The study was prompted by an unexpected cell failure of a real PEMFC stack during its initial conditioning. A little gas leak had been detected in the stack, and the gas leak was suspected to generate pinholes. However, in spite of the large gas leak, pinholes did not appear in the normal cells with a GDL-covered catalyst layer. Additional cells with a GDL-uncovered catalyst layer simulating an uneven electrode edge of the failed stack were then tested under the gas leak conditions. Pinholes were demonstrated to appear at the GDL-uncovered catalyst layer position near the gas leak path during the initial conditioning and the phenomena were reproducible. A gas-leak-induced thermal pinhole formation is suggested in which the leaked gas hits the GDL-uncovered low-heat-dissipation catalyst, a hot spot occurs by catalytic combustion, generating the pinhole.
3 研究論文(学術雑誌)
共著
Durable Marimo-like carbon support for Platinum nanoparticle catalyst in polymer electrolyte fuel cell
Koki BABA, Mikka NISHITANI-GAMO, Toshihiro ANDO, Mika EGUCHI
Electrochimica Acta

213, 447-451
2016/07/18



This study deals with the electrochemical stability of carbon-based catalyst supports as the cathode material of a polymer electrolyte fuel cell (PEFC). The platinum catalyst on the carbon black supports (Pt/CB) was investigated for use in the PEFC. Marimo-like carbon (MC) was used for the catalyst support. Electrochemical surface oxidation of the Marimo-like carbon was compared to that of conventional carbon black during simulated start-stop cycles. We observed a different durability of the electrocatalytic activity between the carbon black and the Marimo-like carbon based on the CV measurements and the XPS. In case of the carbon black, the electrochemical active surface area (ECA) decreased and the electric double layer current density increased with increasing number of cycles in the accelerated degradation test (ADT). These results indicated oxidation of the carbon in the Pt/CB by the ADT. In case of the Marimo-like carbon, the ECA decreased less than in the case of the carbon black, and no change was observed in the XPS. These results indicated that surface oxidation of the Marimo-like carbon proceeded less than that of the conventional carbon black.
4 研究論文(大学,研究機関紀要)
共著
マリモ状カーボン繊維を利用した物質拡散性に優れる燃料電池用触媒の開発
馬場恒生,江口美佳,蒲生西谷美香,安藤寿浩
エフシー開発技術誌

26-30
2015/11




5 研究論文(大学,研究機関紀要)
共著
PEFCスタック各セルの流量およびガスリーク計測
浅本麻紀子,堤 泰行,郡司浩之,江口美佳
エフシー開発技術誌

22-25
2015/11




6 研究論文(大学,研究機関紀要)
共著
ガスリークに起因するPEFC電極端ピンホール発生
関根史明,堤 泰行,郡司浩之,江口美佳
エフシー開発技術誌

17-21
2015/11




7 研究論文(国際会議プロシーディングス)
共著
Electrochemical characteristics of a Li4Ti5O12/Marimo carbon composite
Kazuhiro Soutome, Risa Shiraishi, Mika Shiraishi, Mikka Nishitani-Gamo, Toshihiro Ando, Mika Eguchi
ISE2015

s03-079
2015/10/07



Lithium ion batteries have attracted attention as a possible methodology for solving current environmental and energy problems. However, a greater power density and cycle life are required to satisfy industrial needs. Li4Ti5O12 is as an alternative anode material to graphite due to its long cycle life and good high-rate performance. Unfortunately, Li4Ti5O12 has poor electronic conductivity (ca. 10−13 S cm−1) [1]. We have used a new carbon material called “Marimo carbon” as a conductivity assistant in order to improve the overall electric conductivity. Marimo carbon has a spherical structure that consists of an oxidized diamond as its core and radial carbon nanofilaments (CNFs) [2]. The electrolytes can easily sink into the vacant spaces of the CNFs, consequently, the improved electric conductivity is expected to obtain with the Li4Ti5O12/Marimo carbon composite. Although acetylene black is widely used as a conductivity assistant, the material can easily aggregate to give a non-uniform distribution. Conversely, it is expected that Marimo carbon will provide a better accessibility by allowing the Li4Ti5O12 particles to fit in between the vacant spaces of the CNFs.
8 研究論文(国際会議プロシーディングス)
共著
Electrochemical characterization of Marimo carbon supported Pt–Pd
Kazuma Furuhashi, Risa Shiraishi, Mika Shiraishi, Mikka Nishitani-Gamo, Toshihiro Ando, Mika Eguchi
ISE2015

s04-030
2015/10/07



Pt is utilized as a catalyst for polymer electrolyte fuel cells (PEFCs). However, because Pt is a novel metal, a method must be devised to reduce its required amount in PEFCs. A widely-studied solution for reducing the amount of Pt is to employ a binary catalyst composed of both Pt and Pd. The addition of Pd is suggested to reduce the amount of required Pt without lowering the activity of the catalyst. This catalyst is generally used in the form of nanoparticles that are dispersed uniformly on a carbon black support in order to increase a surface area of the catalyst. However, the surface area of the dispersed Pt on a carbon black support is smaller due to its tendency to aggregate. We have used Marimo carbon as an alternative for a catalyst support [1]. Marimo carbon is a spherical carbon that is composed of carbon nanofilaments (CNFs). Catalysts can therefore be supported in a highly dispersed form on the CNFs. Consequently, there is an expected increase in the surface area of the Pt, which can also increase its likelihood in contributing positively towards the reaction. In this study, we evaluated the efficacy of a Pt-Pd binary catalyst supported on Marimo carbon.
9 研究論文(国際会議プロシーディングス)
共著
Enhancement of polymer electrolyte fuel cell performance
using a Marimo carbon
Koki Baba, Risa Shiraishi, Mika Shiraishi, Mikka Nishitani-Gamo, Toshihiro Ando, Mika Eguchi
ISE2015

s04-025
2015/10/07



Polymer electrolyte fuel cells (PEFCs) can function with a high efficiency for fast start-up time. Platinum nanoparticles supported on the high surface area of nanoporous carbon materials (Pt/CB) are primarily used as a catalyst in PEFCs. However, there are two key technical challenges, (i) the ORR activity needs to be enhanced in order to reduce the overall expense from the high platinum loading amounts, and (ii) the long term durability of the catalysts must be improved in order to extend the operational lifetimes of the catalyst [1]. We have applied Marimo carbon as a catalyst support for the PEFCs. The Marimo carbon is composed of many carbon nanofilaments(CNFs), and the CNFs are interwoven to form a spherical secondary shape. This structure should be favorable toward its utilization in PEFCs. In this study, we prepared MEAs using a Pt catalyst supported on the Marimo carbon (Pt/MC) and/or conventional carbon black (Pt/CB) and investigated the performance of the PEFC.
10 研究論文(学術雑誌)
共著
TiO2/Marimo carbon composite as an electrode material for lithium secondary batteries
K. Miyoshi, K. Iwasawa, K. Baba,H. Ota, M. Nishitani-Gamo, T. Ando, M. Eguchi
MNC2014

7P-11-20
2014/11/07



Carbon materials have been used as the conductive additive of lithium-ion batteries for both the anode and cathode. The battery performance is significantly affected by the contact and dispersion between the active material and carbon.1) In this study, we focused on the Marimo carbon as a new conductive carbon material in terms of its unique structure. The Marimo carbon consists of radial carbon nanofilaments.2) Each of the carbon nanofilaments is interwoven to generate uniform conductive paths. The diameter of the carbon nanofilaments is very small, thus there are many vacant spaces between the carbon nanofilaments. The H2O molecule cluster can easily move through them. We propose a new type of conductive composite material made of TiO2 and the Marimo carbon. We prepared the TiO2/Marimo carbon composite using a hydrothermal method. The Marimo carbon should work as the conductive additive and TiO2 should work as the active material in the electrode.
11 研究論文(国際会議プロシーディングス)
共著
Characterization of LiCoO2 / Marimo carbon composite for lithium ion battery
Kenta Iwasawa, Hiraku Ota, Mikka Nishitani-Gamo, Toshihiro Ando, Mika Eguchi
65th Annual Meeting of the International Society of Electrochemistry

ise140579
2014/09/02



Electrode materials for lithium ion batteries have been investigated. Oxide materials are used as the electrode material for lithium ion batteries. However, such oxides have a high resistance. Therefore, carbon black is added to the electrode materials as a conductive additive. When the oxide and carbon mix, it is usually a mixture of the solid oxide and solid carbon black. It is very difficult to disperse it, because it tends to aggregate. We applied the Marimo carbon to form a new composite. The Marimo carbon consists of many carbon nanofilaments (CNFs), and the CNFs are interwoven to form a spherical secondary shape. This carbon is easy to handle compared to carbon black and Carbon nanotube (CNT). The Marimo carbon has a large space volume between nanofilaments. The spaces can pass water molecules. This leads the Marimo carbon to disperse easily into a water solution. In this study, we prepared the LiCoO2/Marimo carbon composite using a hydrothermal synthesis method and characterized its physical properties.
12 研究論文(国際会議プロシーディングス)
共著
Corrosion of carbon supports for PEFC under current cycled conditions
Koki Baba, Hiraku Ota, Mikka Nishitani-Gamo, Toshihiro Ando, Mika Eguchi
65th Annual Meeting of the International Society of Electrochemistry

ise141804
2014/09/02



Carbon blacks are well known to be a catalyst support for the PEFCs. In recent years, fibrous carbon materials are attracting attention due to their high electric conductivity and water repellence. We used a novel spherical carbon material [1] for catalyst support. The spherical carbon is composed of a high density of carbon nanofilaments, and includes an oxidized diamond particle as a core. We examined durability changes during current cycled of catalysts, which were compared result of cyclic voltammogram (CV) and X-ray photoelectron spectroscopy (XPS).
13 研究論文(国際会議プロシーディングス)
共著
Characterization of LiFePO4/Marimo carbon composite for lithium ion battery
K. Iwasawa, H. Ota, M. Nishitani-Gamo, T. Ando and *M. Eguchi
IUMRS-ICA2014

A2-O26-001
2014/08/26



Oxides are used as the electrode material for lithium ion batteries. However, such oxides normally have a high resistance. Usually, carbon black is added to the electrode materials as a conductive additive. It is very difficult to disperse it, because it tends to aggregate. We applied the Marimo carbon as a new carbon material for making a new composite. The Marimo carbon consists of a core and many fine carbon nanofilaments, and its secondary form is a spherical ball-like shape. This carbon has a large space volume between nanofilaments. The space is enough large for water molecules and metal ions to pass through. This leads the Marimo carbon to disperse easily into a water solution. The oxides can be deposited between the carbon nanofilaments from the target ionic solution. So, we applied to prepare the LiCoO2/Marimo carbon composite using a liquid phase deposition process.
14 研究論文(国際会議プロシーディングス)
共著
Durability of Marimo carbon catalyst support under current cycled operating conditions
K. Baba, M. Eguchi*, M. Nishitani-Gamo, T. Ando
IUMRS-ICA2014

A2-O26-002
2014/08/26



Polymer electrolyte fuel cells (PEFC) can convert energy to electric energy with a high efficiency. An amorphous carbon-supported Pt catalyst (Pt/C) is used as the fine powder catalyst. The amorphous carbon has many inner pores and a high surface area that is caused by its random structure. However, this structure causes a decreased cell performance. In addition, the amorphous carbon was easily destroyed. We reported a carbon supported Pt catalyst using a novel carbon nanomaterial1). It is called Marimo carbon2). The Marimo carbon particle mainly consists of many entangled carbon nanofilaments which have a spherical shape. In this study, we measured its performance as the PEFC under various conditions and the stability of the catalyst using the Marimo carbon electrode.
15 研究論文(国際会議プロシーディングス)
共著
Preparation of the Marimo carbon supported Pt-Pd bimetal catalyst,
K. Furuhashi, H. Gunji, H. Ota, M. Eguchi*, M. Nishitani-Gamo, T. Ando
IUMRS-ICA2014

A2-O26-003
2014/08/26



We have reported that Marimo carbon can be an excellent support material for PEFC. The Marimo carbon consists of many carbon nanofilaments (CNFs), and has a sufficient space volume between the CNFs. The bimetal catalyst of platinum and palladium shows good oxygen reduction reaction activity. In this study, a bimetal catalyst of palladium and platinum was supported on the Marimo carbon, and the catalyst was produced.
16 研究論文(国際会議プロシーディングス)
共著
Electrochemical properties of TiO2/Marimo carbon composite as an electrode material for lithium-ion batteries
K. Iwasawa, K. Miyoshi, M. Eguchi, M. Nishitani-Gamo, T. Ando
MNC 2013

8P-11-27
2013/11/08



In this study, we prepared a TiO2/Marimo carbon composite using the Marimo carbon under hydrothermal conditions and investigated its electrochemical properties as an electrode material for lithium secondary batteries. SEM images of the TiO2/Marimo carbon composite shows the Marimo carbon fibers filled with the TiO2 were observed. X-ray diffraction patterns of the TiO2/Marimo carbon shows that all the peaks of TiO2 were attributed to the anatase phase. The peak of the TiO2/Marimo carbon was attributed to the anatase phase, graphite and diamond. The first discharge capacity of the TiO2/Marimo carbon at 0.1 C was 189 mAh g-1.
17 研究論文(学術雑誌)
共著
Preparation of TiO2/Marimo carbon composite
K. Iwasawa, M. Eguchi, K. Miyoshi, S. Ueda, M. N-Gamo, T. Ando
Transactions of the Materials Research Society of Japan

38/ 4, 549-553
2013/08/12



Recently, a carbon material having a fine structure of nanometer size is very interesting as the next generation of functional materials. These carbon materials are expected to be used in various fields. The carbon nano filaments (CNFs) have been developed as a new carbon material. The Marimo carbon is typical of this type of CNF, having a cup-stack structure. This carbon material was also used as a catalyst support in fuel cells. In this study, we prepared a TiO2/ Marimo carbon composite using the Marimo carbon.
18 研究論文(学術雑誌)
共著
Preparation of the Pt-Co bimetallic catalyst on the Marimo carbon for PEFC
Mika Eguchi, Kazuhisa Sato, Kenta Iwasawa, Mikka Nishitani-Gamo and Toshihiro Ando
Transactions of the Materials Research Society of Japan

38/ 4, 573-577
2013/07/09



A fibrous carbon material with the characteristics of good repellency and electronic conductivity has been attracting attention as a new catalyst support for PEFCs. The Carbon
Nano Filaments (CNFs) have a structure of stacked graphene cups. The edge of the graphene cup is exposed to the surface of the fiber. Therefore, the Pt nanoparticle can be expected to be supported in a high dispersion without heat treatment and mechanical processing on the surface of the CNFs. We used the Marimo carbon, which is a kind of CNF as the carbon catalyst support. In this study, we prepared the PtCo/Marimo carbon and changed the ratio of the Pt and Co by the nanocolloidal solution method.
19 研究論文(学術雑誌)
共著
Interfacial Nanostructure of the Polymer Electrolyte Fuel Cell Catalyst Layer Constructed with Different Ionomer Contents
Koki Baba, Kenta Iwasawa, Mika Eguchi, Yoshio Kobayashi, Maya Kobori, Mikka Nishitani-Gamo, and Toshihiro Ando
Japanese Journal of Applied Physics

52/ 6, 06GD06-5
2013/06/20



Fibrous carbon materials such as carbon nanotubes (CNTs) and carbon nanofilaments (CNFs) have attracted attention for use in the polymer electrolyte fuel cells (PEFCs). We have applied one type of fibrous carbon materials named Marimo carbon (MC) as the catalyst support. The modified nanocolloidal method was used preparing the Marimo carbon supported Pt catalyst (Pt/MC). And then, ionomer/carbon ratio in the cathode catalyst layer of the PEFC has been investigated for its effect on performance and structure of the membrane electrode assembly (MEA). The morphologies and cell performance of cathode catalyst layer using Marimo carbon changed dramatically with ionomer content. In case of excess ionomer, the air volume between CNFs was plugged up by ionomer, and blocked supply fuel gas diffusion caused decrease cell performance. PEFC cell performance was increase with decreasing ionomer content.
20 研究論文(国際会議プロシーディングス)
共著
Hydrothermal Synthesis of LiFePO4/Marimo Carbon Composite
Kenta Iwasawa, Yuya Suzuki, Satoru Ueda, Mika Eguchi, Mikka Nishitani-Gamo, Hiraku Ohta, and Toshihiro Ando
The 19th International Conference on Solid State Ionics

Mon-D-023
2013/06/03



Phospho-olivine LiFePO4 have been investigates, because, it has thermal stability. Moreover, LiFePO4 is a low cost material and highly compatible environment.
We used a new carbon material for making a composite. This carbon is a kind of carbon nanofilament (CNF). It is called "Marimo carbon" because it is similar in form to Marimo. The Marimo carbon has large space volume between nanofilaments. The spaces can pass water molecules. This leads the Marimo carbon to disperse easily into water solution .
In this study, the composite of LiFePO4 and Marimo carbon, using a hydrothermal synthesis method to make the LiFePO4/Marimo carbon composite and its physical properties ware investigated.
21 研究論文(国際会議プロシーディングス)
共著
Hydrothermal synthesis of TiO2/Marimo carbnon composite
Kenta Iwasawa, Kenta Miyoshi, Satoru Ueda, Mika Eguchi, Mikka Nishitani-Gamo, Hiraku Ohta and Toshihiro Ando
The 19th International Conference on Solid State Ionics

Mon-D-005
2013/06/03



Various materials for the electrode of a lithium-ion battery have been investigated. In this study, the composite of TiO2 and Marimo carbon, using a hydrothermal synthesis method to make the TiO2/Marimo carbon composite and its physical properties ware investigated. The Marimo carbon fibers have many vacant spaces. The spaces can pass water molecules. Based on this behavior, it is possible to make a composite. Even with another material, it would possible that make another composite from the liquid phase synthesis.
22 研究論文(国際会議プロシーディングス)
共著
Characterization of Marimo carbon supported PtCo catalyst by the nanocolloidal solution method
Kazuhisa Sato, Maya Kobori, Kenta Iwasawa, Mika Eguchi, Mikka Nishitani-Gamo and Toshihiro Ando
The 19th International Conference on Solid State Ionics

Mon-D-078
2013/06/03



Carbon black (CB) is generally used as catalysts
support carbon in Polymer Electrolyte Fuel Cell. The
cell performance of the long term operation decreases
due to the carbon corrosion of the carbon black [1]. We
applied the Marimo carbon as a carbon supported cata-
lyst. This carbon is a kind of carbon nanofila-
ment(CNFs). The Marimo carbon consists of many
CNFs, and the CNFs are interwoven to form a spherical
secondary shape. The CNFs is not corroded easily
compared with the CB. In this study, we prepared the
Marimo carbon supported the Pt and PtCo by the nano-
colloidal solution method. We carried out XRD, TEM
and XPS to investigate the characterization of the cata-
lysts.
23 (MISC)総説・解説(国際会議プロシーディングズ)
共著
Development of the PEFC electrode using a novel carbon nanomaterial
Koki Baba, Mika Eguchi, Yoshio Kobayashi, Maya Kobori, Mikka Nishitani-Gamo, Toshihiro Ando
The 19th International Conference on Solid State Ionics

Mon-D-067
2013/06/03



Polymer electrolyte fuel cells (PEFCs) can convert
chemical energy to electric energy with high efficiency.
Carbon supported Pt catalyst (Pt/C) was used as the fine
powder metal catalyst. Amorphous carbon was used as
the carbon supported. The amorphous carbon has a lot
of inner pores and large surface area that is caused ran-
dom structure. But, this structure causes a decreased cell performance. There are many blind alleys and air pockets (gas is not supplied) in the carbon structure. The Pt catalysts are not show catalyst activity in these areas causes the fuel gas flow is blocked. We reported the carbon supported Pt catalyst using a novel carbon nanomaterial. It called Marimo carbon. A Marimo carbon particle is consisted mainly by entangled many carbon nanofilaments and it has spherical shape. The fuel gas flow ability should show great in this structure. In this study, we prepared membrane electrode assemblies (MEAs) using the Marimo carbon supported Pt catalyst. Then, we measured it performance as the PEFC under various conditions and determined best condition for the catalyst using the Marimo carbon electrode.
24 研究論文(学術雑誌)
共著
The Marimo carbon as a polymer electrolyte fuel cel
l catalyst support
M. Eguchi, K. Baba, K. Iwasawa, M. Nishitani-Gamo and T. Ando
Transactions of the Materials Research Society of Japan

38/ 3, 349-352
2013/04/29



A fibrous carbon material has been used as the catalyst support of a polymer electrolyte fuel cell (PEFC) that is called Marimo carbon (MC). The Marimo carbon has a sufficient space volume between the each fiber with out any fine pores. The Marimo carbon supported Pt catalyst (Pt/MC) should show a performance different from the traditional catalyst. The Pt/MC has a better performance than the traditional catalyst when the ionomer content is less than 15.5 wt% in the catalyst layer. The traditional catalyst needs about 25 wt% ionomer for optimal performance. By using the Marimocarbon, we simultaneously succeeded in increasing the cell performance and reducing the Pt catalyst and ionomer in the catalyst layer.
25 研究論文(学術雑誌)
共著
中性子線と分割電極セルの組み合わせによる固体高分子形燃料電池の水計測技術
上田 悟、江口 美佳、小林 芳男、堤 泰行、プトラアナンダ、山口 大輔、小泉 智
高分子論文集

70/ 3, 94-101
2013/03/25



固体高分子形燃料電池(PEFC)の高性能化にとってPEFCセル内の水分移動は重要な課題である。本研究は,中性子小角散乱(SANS)と中性子ラジオグラフィー(NR)を用いて発電状態下にあるPEFC内の水分移動を可視化した。SANSは直径10mmの小さい入射ビームを使用して高分子電解質膜の膨潤挙動を観察するための効果的な方法である。発電時には電解質膜内の水クラスタサイズが電流密度の増加に伴い増大することが確認できた。またサーペンタイン状のガス流路に沿って不均一に増大することを確認した。NR は流路に沿ったフラッディングを確認した。SANS観測に対応して局部電池電圧を測定するために,私たちはシャント抵抗回路を組み合わせた分割電極セルを開発し,SANS測定と同条件でI-V試験を行い,各電極の電圧,電流密度,抵抗値をそれぞれ評価した。それらの結果とNR,SANSで得られた結果を比較することで加湿水,生成水による電解質膜の膨潤,流路へのフラッディングを電池局所の膜抵抗や発電特性を包括的に議論した。
26 研究論文(学術雑誌)
共著
Influence of ionomer/carbon ratio on the performance of a polymer electrolyte fuel cell
Mika Eguchi, Koki Baba, Takamitsu Onuma, Kazuma Yoshida, Kenta Iwasawa, Yoshio Kobayashi, Katsuhiro Uno, Keishiro Komatsu, Maya Kobori, Mikka Nishitani-Gamo and Toshihiro Ando
Polymers

4/ 4, 1645-1656
2012/11/20



We have used fibrous carbon materials as polymer electrolyte fuel cell (PEFC) electrodes. We have examined the influence of the ionomer/carbon ratio on the performance of the PEFCs. The Marimo carbon is a kind of carbon with a spherical shape, and consists of carbon nanofilaments. Fibrous carbon materials have large specific surface areas without fine pores. The reactant gases and generated water can easily diffuse among the nanofilaments. The ionomer plays two roles; one is a proton transfer activity and the other is binding the catalyst electrodes. An excess ionomer interferes with the diffusion of gases. The ionomer/carbon ratio should affect the performance of the PEFC, especially at a high current density.
27 研究論文(国際会議プロシーディングス)
共著
Characterization of TiO2/carbon composite nanostructure for Lithium ion battery
K. Iwasawa, K. Miyoshi, S. Ueda, M. Eguchi, Y. Kobayashi,
M. Kobori, M. Nishitani-Gamo, T. Ando
MNC 2012

2P-11-71
2012/11/02



Oxide electrode materials have been studied for lithium-ion batteries. Oxide electrode is added to the carbon black as conductive additive. However, it is very difficult to be uniformly dispersed nano-size carbon. We therefore used a new carbon material for make a composite. This carbon is a kind of carbon nanofilaments (CNF). The carbon consists of many CNFs, and the CNFs are interwoven to from a spherical secondary shape. The Marimo carbon has a sufficient space volume between the CNFs. We prepared TiO2 from liquid phase using the hydrothermal synthesis method to compose with the carbon. The prepared sample is anatase TiO2, and it is containing carbon. Charge and discharge characteristics were measured at 0.1 C rate between 1.5 V and 3.0 V by coin-type cell. The cell was able to be charged and discharged. Charge capacity was 253 mAhg-1 and discharge capacity was 163 mAhg-1.
28 研究論文(国際会議プロシーディングス)
共著
Interfacial nanostructure of the polymer electrolyte fuel cell catalyst layer constructed with different Ionomer contents
K. Baba, T. Onuma, K. Iwasawa, M. Eguchi, Y. Kobayashi,
K. Komatsu, M. Kobori, M. Nishitani-Gamo,
T. Ando
MNC 2012

2P-11-8
2012/11/02



Polymer electrolyte fuel cells (PEFCs) can convert chemical energy to electrical energy with high efficiency. To study the Pt catalyst layer leads to improve the PEFC efficiency. Fibrous carbon materials such as carbon nanotubes (CNTs) and carbon nanofilaments (CNFs) have attracted attention for use in the PEFC. We have applied one type of fibrous carbon materials named Marimo carbon to the catalyst support. The marimo carbon consists of many CNFs1), Carbon nanofilament (CNF) is one of the fibrous carbon materials. CNFs tangled each other to form a spherical secondary shape. The marimo carbon has enough space volume between CNFs. The CNFs have a cup-stack primary structure. The edges of graphene sheets are exposed on the CNFs surface. The edges can be supporting sites for Pt catalyst.
The catalyst layer for the PEFC consists of 1)electrolyte, 2)supported catalyst and 3)space volume. They should play as an 1)ion conductive route, 2)a catalytic reaction site and 3)a gas diffusion path for reaction gases. The contents of these parts give a considerable influence for the PEFC performance. Less ionomer causes to decrease the proton conduction and decrease the cell voltage. Much ionomer causes to block space volume and increase the cell resistance. Excess ionomer prevents reactant gases from coming and product water from going.
The influence of the ionomer ratio to Marimo carbon should be different from that of the ionomer ratio to carbon black. We prepared the Pt catalyst using the Marimo carbon and evaluated an influence of the ionomer ratio to carbon materials for the PEFC performance.
29 研究論文(国際会議プロシーディングス)
共著
Nanostructure of PtCo bimetal particles for PEFC
K. Sato, T. Onuma, K. Komatsu, M. Kobori, K. Iwasawa, M. Eguchi, Y. Kobayashi, M. Nishitani-Gamo, and T. Ando
MNC 2012

1P-7-18
2012/11/01



In Polymer electrolyte fuel cells (PEFCs) system, oxygen reduction reaction (ORR) is the main reaction on the cathode. It is essential for the ORR to improve activity of catalyst. Some reports have suggested that Pt-M (M = Ni, Fe, Co) bimetallic catalysts gave higher catalytic activity for the ORR than the Pt catalyst1), 2). The Pt-Co bimetallic catalyst gave the highest activity in the Pt-M (M = Ni, Fe, Co) bimetallic catalyst2). The carbon nanofiraments (CNFs) are used as catalyst supports. The CNFs have a cup-stack primary structure(Fig. 1, 2). The edges of the graphene sheets are exposed to the surface of the nanofiraments. Pt particles can be supported on the surface of the CNFs in a high dispersion without any heat pretreatments and mechanical processings3). We used the Marimo carbon which consisted of CNFs as a catalyst support. In this study, we prepared the Pt-Co bimetallic catalyst on the CNFs of the Marimo carbon by the modified nanocolloidal solution method. We investigated the structure of the Pt-Co bimetallic particles with various contents of Co to Pt.
30 研究論文(国際会議プロシーディングス)
共著
Preparation of Marimo Carbon Supported PtCo Bimetal Catalyst by the Nanocolloidal Solution Method
K. Sato, T. Onuma, K. Komatsu, M. Kobori, K. Iwasawa, M. Eguchi, Y. Kobayashi, M. Nishitani-Gamo, and T. Ando
Pacific Rim Meeting (PRiME 2012)

#44
2012/10/07



The Carbon Nano Filaments (CNFs) have a
structure of stacked graphene cups. The edge of the
graphene cup is exposed to the surface of the fiber.
Therefore, the Pt nanoparticle can be expected to be
supported in a high dispersion without heat treatment and
mechanical processing on the surface of the CNFs. We
used the Marimo carbons which is a kind of CNF as the
carbon catalyst support. In this study, we prepared the
PtCo/Marimo carbon and changed the ratio of the Pt and
Co by the nanocolloidal solution method.
31 研究論文(国際会議プロシーディングス)
共著
TiO2/Marimo Carbon Composite as a New Material for Lithium Ion Battery
K. Iwasawa, S. Ueda, M. Eguchi, Y. Kobayashi, M. Kobori, M. Nishitani-Gamo, and T. Ando
Pacific Rim Meeting (PRiME 2012)

#910
2012/10/07



The carbon nano filaments (CNFs) have been developed
as a new carbon material. As shown in Fig. 1, the
Marimo carbon is typical of this type of CNF which have
the structure of the fibers. The fibers have many vacant
spaces. This carbon material was also used as a catalyst
support in fuel cells. In this study, we prepared a TiO2/
Marimo carbon composite using the Marimo carbon.
32 研究論文(国際会議プロシーディングス)
共著
Segmented Electrode Developed for Complementary Use of Small-Angle Neutron Scattering Measuremen
S. Ueda, K. Baba, M. Eguchi, Y. Kobayashi, S. Koizumi, and Y. Tsutsumi
Pacific Rim Meeting (PRiME 2012)

#144
2012/10/07



Small-angle neutron scattering (SANS) is a
powerful technique in order to visualize swelling
behaviors of a polymer electrolyte membrane during cell
operation. Figure 1 shows the schematic illustration.
Using a small incident beam with 10 mm in diameter,
we determined inhomogeneous swelling of membrane or
ion-cluster size distribution appeared along a serpentine
gas flow channel in a course of increase of current density.
To determine local cell voltage, corresponding to SANS
observation, we developed the segmented electrode
combined with a shunt resistance circuit.
33 研究論文(国際会議プロシーディングス)
共著
The effect of the Relationship between Ionomer and Carbon in the PEFC Catalyst Layer
K. Baba, T. Onuma, K. Iwasawa, M. Eguchi, Y. Kobayashi, K. Komatsu, M. Kobori, M. Nishitani-Gamo, and T. Ando
Pacific Rim Meeting (PRiME 2012)

#46
2012/10/07



A fibrous forms of carbon materials such as
Carbon Nano Tubes (CNTs) and Carbon Nano Filaments
(CNFs) have attracted attention for use in a Polymer
Electrolyte Fuel Cell (PEFC). The Marimo carbon is one
of these CNFs, and has a cup-stack structure such that the
edge of the graphene sheets is exposed to the filament
surface. We prepared Pt/Marimo carbon from which the
Pt particle was highly dispersed on the filament surface of
the Marimo carbon. A Catalyst Coated Membrane (CCM)
was made of the Pt/Marimo carbon, and the
electrochemical measurement of the CCM was then
carried out. The catalyst mixture, electrolyte, and
porosity ratio in the catalyst layer are important for the
CCM performance. In this study, we made CCMs with
various ionomer ratios using the Marimo carbon catalyst.
fWe evaluated these CCMs by observing the electrode
surface usig a Scanning Electron Microscope (SEM) and
the electrochemical measurements using a PEFC single
cell.
34 研究論文(国際会議プロシーディングス)
共著
Effects of Misaligned Electrode for Measurement in PEFC with Reference Electrode
K. Baba, S. Ueda, M. Eguchi, Y. Kobayashi, and Y. Tsutsumi
Pacific Rim Meeting (PRiME 2012)

#47
2012/10/07



In PEM fuel cell studies, a reference electrode is sometimes used in an attempt to measure and monitor the polarization of both anode and cathode independently. It is well known1)2)3) that the current and potential distribution at the edge of electrodes in a PEM fuel cell is usually non-uniform and the misalignment of the electrodes can significantly affect the accuracy of electrode polarization measurements. Inaccuracy is particularly pronounced when the overhanging distance of the slow kinetic cathode is much longer than the membrane thickness.
35 研究論文(国際会議プロシーディングス)
共著
Preparation of TiO2/ Marimo carbon composite
K. Iwasawa, M. Ishihara, S. Ueda, M. Eguchi, Y. Kobayashi, M. Kobori, M.Nishitani-Gamo, T.Ando
IUMRS-ICEM 2012

A-8-P26-007
2012/09/26



Recently, a carbon material having a fine structure of nanometer size is very interesting as the next generation of functional materials. These carbon materials are expected to be used in various fields. The carbon nano filaments (CNFs) have been developed as a new carbon material. The Marimo carbon is typical of this type of CNF, having a cup-stack structure. This carbon material was also used as a catalyst support in fuel cells. In this study, we prepared a TiO2/Marimo carbon composite using the Marimo carbon.
36 研究論文(国際会議プロシーディングス)
共著
The Marimo carbon as a polymer electrolyte fuel cell catalyst support
K. Baba, T. Onuma, K. Iwasawa, M. Eguchi*, Y. Kobayashi, K. Komatsu, M. Kobori,
M. Nishitani-Gamo, T. Ando
IUMRS-ICEM 2012

A-8-P26-006
2012/09/26



A fibrous form carbon materials such as Carbon Nano Tubes (CNTs) and Carbon Nano Filaments (CNFs) attract attention as a the Polymer Electrolyte Fuel Cell (PEFC). The Marimo carbon is a kind of this CNFs, and has cup-stack structure that the edge of graphene sheets is exposed to the filament surface. We Prepared Pt/Marimo carbon from which the Pt particle was supported to high dispersion on the filament surface of the Marimo carbon. Catalyst Coated Membrane (CCM) was made of the Pt/Marimo carbon, and the electrochemical measurement of CCM was carried out. The mixture catalyst, electrolyte, and porosity ratio in catalyst layer are important to the CCM performance. In this study, we made CCM of carious ionomer ratios using the Marimo carbon catalyst. We evaluated these CCM by the observation of the electrode surface by Scanning Electron Microscope (SEM) and the electrochemical measurement with the PEFC single cell.
37 研究論文(国際会議プロシーディングス)
共著
Characterization of Marimo carbon supported PtCo nano bimetal catalyst for PEFC
K. Sato*, T. Onuma, K. Komatsu, M. Kobori, K. Iwasawa, M.Eguchi, Y. Kobayashi, M. Nishitani-Gamo, T. Ando
IUMRS-ICEM 2012

B10-P25-023
2012/09/25



A fibrous carbon material with the characteristics of good repellency and electronic conductivity has been attracting attention as a new catalyst support for PEFCs. The Carbon
Nano Filaments (CNFs) have a structure of stacked graphene cups. The edge of the graphene cup is exposed to the surface of the fiber. Therefore, the Pt nanoparticle can be expected to be supported in a high dispersion without heat treatment and mechanical processing on the surface of the CNFs. We used the Marimo carbon, which is a kind of CNF as the carbon catalyst support. In this study, we prepared the PtCo/Marimo carbon and changed the ratio of the Pt and Co by the nanocolloidal solution method.
38 研究論文(国際会議プロシーディングス)
共著
A Structural Investigation of Carbon Nanofilaments in the Marimo Carbon Formation by the Methane Decomposition with Oxidized Diamond-Supported Nickel Catalysts
Keishiro Komatsu, Kiyoharu Nakagawa, Hidenori Gamo, Mika Eguchi, Toshihiro Ando, Mikka Nishitani-Gamo
24th International Microprocesses and Nanotechnology Conference(MNC2011)

27P-11-9
2011/10/27




39 研究論文(学術雑誌)
共著
Preferred test conditions for measuring flow rate distribution between cells in a polymer electrolyte fuel cell stack
Fumiaki Sekine, Mika Eguchi, Yoshio Kobayashi, Yasuyuki Tsutsumi
J.Power Sources

196/ 20, pp.8173-8179
2011/10/15




40 (MISC)総説・解説(国際会議プロシーディングズ)
共著
Proposal of method of measuring flow rate distribution of PEFC stack No.29
F. Sekine, M. Eguchi, Y. Kobayashi, Y. Tsutsumi
2nd International Fuel Cell Summer Seminar2011

p.111
2011/08/29




41 研究論文(国際会議プロシーディングス)
共著
Preparation of Catalyst for Polymer Electrolyte Fuel Cell Using a Marimo Carbon Support P161
Mika Eguchi, Takamitsu Onuma, Kazuma Yoshida, Keishiro Komatsu, Yoshio Kobayashi, Katsuhiro Uno,
Mikka Nishitani-Gamo and Toshihiro Ando
18th Conference on Solid State Ionics

p.231
2011/07/05



本研究では、セル内水分移動現象を解明するため、重水素燃料のPEFC基本性能を検証している。
重水素を燃料とするPEFC性能をさらに解明するため、白金担持量と重水素燃料による性能を比較した。
42 研究論文(国際会議プロシーディングス)
共著
Polymer electrolyte fuel cell performances using deuterium fuel P162
Mika Eguchi, Yuya Suzuki, Yoshio Kobayashi,Yasuyuki Tsutsumi
18th Conference on Solid State Ionics

p.232
2011/07/05



本研究では、セル内水分移動現象を解明するため、重水素燃料のPEFC基本性能を検証している。
重水素を燃料とするPEFC性能をさらに解明するため、白金担持量と重水素燃料による性能を比較した。
43 研究論文(国際会議プロシーディングス)
共著
Preferred test conditions for measuring flow rate distribution between cells in a polymer electrolyte fuel cell stack P414
Fumiaki Sekine, Mika Eguchi, Yoshio Kobayashi, Yasuyuki Tsutsumi
18th Conference on Solid State Ionics

p.474
2011/07/05




44 研究論文(学術雑誌)
共著
Characterization of Multi-Walled Carbon Nanotube-Supported Pt Catalyst Prepared by Metal Nanocolloidal Solution For a Polymer Electrolyte Fuel Cell Catalyst
Mika Eguchi, Shun Yamamoto, Toshiaki Aoki, Mayuko Kikuchi, Katsuhiro Uno, Yoshio Kobayashi, Mikka Nishitani-Gamo and Toshihiro Ando
J. Surf. Finish. Soc. Jpn.

62/ 3, pp.179-183
2011/03/01




45 (MISC)総説・解説(学術雑誌)
共著
重水素燃料電池
堤 泰行,江口美佳,小泉 智
燃料電池

10/ 2, pp.73-76
2010/10/01




46 研究論文(学術雑誌)
共著
Preparation of Catalyst for Polymer Electrolyte Fuel Cell Using a Novel Spherical Carbon Support
Mika Eguchi, Atsuhiko Okubo, Shun Yamamoto, Toshiaki Aoki, Mayuko Kikuchi, Katsuhiro Uno, Yoshio Kobayashi, Mikka Nishitani-Gamo and Toshihiro Ando
J.Power Sources

195/ 18, pp.5862–5867
2010/09/15




47 研究論文(学術雑誌)
共著
A method of measuring flow rate distribution in a PEFC stack that uses hydrogen limiting current
Fumiaki Sekine, Yasuyuki Tsutsumi, Mika Eguchi, Yoshio Kobayashi
J.Power Sources

195/ 18, pp.5971–5974
2010/09/15




48 研究論文(国際会議プロシーディングス)
共著
Preparation of Sucrose Biosensor that uses Polyion Complex Membrane Immobilizing Invertase and Fructose Dehydrogenase
Hiroyuki Gunji, Mika Eguchi, Katsuhiro Uno, and Satoshi Yabuki
The 13th International Meeting on Chemical Sensors
Parth, Australia

p.314
2010/07/13




49 研究論文(学術雑誌)
共著
Effect of PFSA Polymer Content in Catalyst Layer on PEFC Performance under Several Humidity Conditions
Katsuhiro Uno, Mika Eguchi, Taku Suzuki and Yasuyuki Tsutsumi
J. Surf. Finish. Soc. Jpn.

60/ 10, pp.672-675
2009/10/01



触媒層構造とセル性能を関係付ける3つのパラメータ(電子伝導性を持つ触媒,イオン伝導性を持つイオノマー,ガス透過性を持つ空隙のそれぞれの容積比)からなる触媒層成分状態図(三相界面相図)を提案し,触媒層内のイオノマー量を変えたときの触媒層厚みデータとセル性能データを同時に測定し,三相界面相図を実際に描くことを試みた.
50 (MISC)総説・解説(国際会議プロシーディングズ)
共著
Visualization of defects on flat surfaces by the laser sheet
Katsuhiro Uno, Tsukasa Yamaaki, Mika Eguchi and Isao Shimizu
8th Japan-Finland Joint Symposium on Optics in Engineering

6E 57-58
2009/09/04



シート状にしたレーザーを平面試料に斜めから照射し,表面の広範囲の凹凸を一度に計測する手法と,表面の欠陥部分のみを光学的に抽出する手法について,その有効性を実験的に確認した。
51 (MISC)総説・解説(学術雑誌)
共著
水素限界電流を利用したPEFCスタックのセル間流量分布計測
堤 泰行,関根史明,江口美佳,小林芳男
燃料電池

9/ 2, pp.68-71
2009/09/01




52 研究論文(国際会議プロシーディングス)
共著
Characterization of Multi-Walled Carbon Nanotube Supported Pt Catalyst Prepared by Metal Nanocolloidal Solution For Polymer Electrolyte Fuel Cell Catalystsupports
Mika Eguchi, Shun Yamamoto, Toshiaki Aoki, Mayuko Kikuchi, Katsuhiro Uno, Yoshio Kobayashi, Mikka Nishitani-Gamo and Toshihiro Ando
4th International Conference on Polymer Batteries and Fuel Cells (PBFC2009)

2P-50
2009/08/04




53 研究論文(国際会議プロシーディングス)
共著
Preparation of Catalyst for Polymer Electrolyte Fuel Cell Using a Novel Spherical Carbon Support
Mika Eguchi, Atsuhiko Okubo, Shun Yamamoto, Toshiaki Aoki, Mayuko Kikuchi, Katsuhiro Uno, Yoshio Kobayashi, Mikka Nishitani-Gamo and Toshihiro Ando
4th International Conference on Polymer Batteries and Fuel Cells (PBFC2009)

2P-52
2009/08/04




54 研究論文(国際会議プロシーディングス)
共著
A method of measuring flow rate distribution in a PEFC stack that uses hydrogen limiting current
Fumiaki Sekine, Yasuyuki Tsutsumi, Mika Eguchi, Yoshio Kobayashi
4th International Conference on Polymer Batteries and Fuel Cells (PBFC2009)

2P-66
2009/08/04




55 研究論文(国際会議プロシーディングス)
共著
Measuring method of the flow rate distribution between cells for a PEFC stack utilizing hydrogen limiting current
Fumiaki Sekine, Yasuyuki Tsutsumi, Mika Eguchi, Yoshio Kobayashi, Tasuku Miyamoto
17th Conference on Solid State Ionics

P068
2009/06/30



スタックセルのセル間流量分布を計測する方法は幾つか報告されているが,研究用に開発された専用セルを用いた報告が多く,実用セルを測定する方法は報告されていない.本報告では,水素限界電流を利用した実用燃料電池スタックセルのセル間流量分布を測定方法の開発について検討した.
56 研究論文(国際会議プロシーディングス)
共著
Electrode catalyst for polymer electrolyte fuel cells based on multi-walled carbon nanotubes as Pt catalyst supports
Mika Eguchi, Shun Yamamoto, Toshiaki Aoki, Yoshio Kobayashi, Mikka Nishitani-Gamo, Toshihiro Ando, Katsuhiro Uno and Yasuyuki Tsutsumi
17th Conference on Solid State Ionics

P264
2009/06/30



電子電導性およびガス拡散性が向上すると考えられるカーボンナノチューブ(CNT)を用いた触媒層が提案されている.本研究では,熱処理を必要としない極めて容易な方法である金属ナノコロイド溶液法を用いてPtナノ粒子をCNTに担持した.
57 研究論文(学術雑誌)
共著
TheMechanism of Direct Formic Acid Fuel Cell Using Pd, Pt and Pt-Ru
Nobuyuki Kamiya, Yan Liu, Shigenori Mitsushima, Ken-ichiro Ota, Yasuyuki Tsutsumi, Naoya Ogawa, Norihiro Kon, and Mika Eguchi
電気学会論文誌A

128/ 12, pp.721-726
2008/12/01




58 研究論文(国際会議プロシーディングス)
共著
Surface profiles of Pt catalyst layers used for membrane electrode assemblies
Katsuhiro Uno, Yutaka Sugimoto and Mika Eguchi
PRiME2008:Pacific Rim Meeting on Electrochemical and Solid-State Science

#882
2008/10/14




59 (MISC)総説・解説(国際会議プロシーディングズ)
共著
Membrane Electrode Assemblies for the Polymer Electrode Fuel Cell Based on Vertically Aligned Carbon Nanotubes
Shun YAMAMOTO, Takuya KURIHARA, Kensuke HASHIMOTO, Tasuku MIYAMOTO, Mika EGUCHI, Yoshio KOBAYASHI, Takashi KOMINE
and Katsuhiro UNO
PRiME2008:Pacific Rim Meeting on Electrochemical and Solid-State Science

#885
2008/10/14




60 (MISC)総説・解説(国際会議プロシーディングズ)
共著
Laser diffraction by the catalyst layers of membrane-electrode assemblieselectrolyte fuel cell
Katsuhiro Uno, Mika Eguchi, and Yasuyuki Tsutsumi
59th Annual Meeting of International Society of Electrochemistry

s08-P-128
2008/09/07




61 (MISC)総説・解説(国際会議プロシーディングズ)
共著
Relation between carbon support structure and ionomer/catalyst ratio in catalyst layer of polymer electrolyte fuel cell
Mika Eguchi, Taku Suzuki , Katsuhiro Uno, and Yasuyuki Tsutsumi
59th Annual Meeting of International Society of Electrochemistry

s08-P-074
2008/09/07




62 研究論文(学術雑誌)
共著
PEFC用参照電極付きセルの開発
堤 泰行、小野 征一郎、江口 美佳
電気学会誌B

128/ 8, pp.1020-1026
2008/08/05




63 研究論文(学術雑誌)
共著
ペルオキシダーゼ固定化ポリイオン複合膜を用いた乳酸センサの作製
岩澤 健太,江口 美佳,鵜野 克宏,矢吹 聡一
電気化学および工業物理化学

76/ 8, pp.552-554
2008/08/05




64 (MISC)総説・解説(国際会議プロシーディングズ)
共著
Basic Concept of the MEA Structure for PEFC
Mika Eguchi, Taku Suzuki , Katsuhiro Uno, and Yasuyuki Tsutsumi
58th Annual Meeting of International Society of Electrochemistry

S02-P-014
2007/09/13




65 (MISC)総説・解説(国際会議プロシーディングズ)
共著
Optical measurement for microporous media of catalyst layers in membrane-electrode assemblies
Katsuhiro Uno, Taku Suzuki, Mika Eguchi, and Yasuyuki Tsutsumi
58th Annual Meeting of International Society of Electrochemistry

S02-P-068
2007/09/13




66 研究論文(学術雑誌)
共著
Structural modifications caused by electrochemical lithium extraction for two types of layered LiVO2 (R3m)
Kiyoshi Ozawa, Yasuhiro Nakao, Lianzhou Wang, Zhenxiang Cheng, Hiroki Fujii,Masashi Hase, Mika Eguchi
Masashi Hase, and Mika Eguchi
J. Power Sources

174, pp.469-472
2007/06/28




67 研究論文(学術雑誌)
共著
Preparation and lithium insertion property of layered LixV2O5
Mika EGUCHI and Kiyoshi OZAWA
Electrochimica Acta

52/ 7, pp.2657-2660
2007/02/01




68 研究論文(学術雑誌)
共著
Electrochemical Characteristics of Direct Dimethyl Ether Fuel Cells Using Pt and Pt-Ru Catalyst.
Satoru Ueda, Mika Eguchi, Katsuhiro Uno, Yasuyuki Tsutsumi and Naoya Ogawa
Solid State Ionics

177/ 19-25, pp.2175-2178
2006/10/15




69 研究論文(国際会議プロシーディングス)
共著
Preparation of L-lactate biosensor that uses polyion complex membrane containing peroxidase and mediator
Kenta Iwaswa, Mika Eguchi, Katsuhiro Uno, and Satoshi Yabuki
The 11th International Meeting on Chemical Sensors
Brescia, Italy

WP62#192
2006/07/16




70 研究論文(国際会議プロシーディングス)
共著
Lithium insertion and extraction properties of two types of the layered LiVO2 (R3m).
Kiyoshi Ozawa, Hiroki Fujii, Masashi Hase, Mika Eguchi, and Katsuhiro Uno
IMLB2006: International Meeting on Lithium Batteries,
Biarritz, France

CD-ROM
2006/06/18




71 研究論文(学術雑誌)
共著
Preparation and Electrochemical Properties of the Layered Material of LixVyO2 (x=0.86 and y=0.8) Li-V-O Lithium battery.
Kiyoshi Ozawa, Lianzhou Wang, Hiroki Fujii, Mika Eguchi, Masashi Hase and Hitoshi Yamaguchi
J. Electrochem. Soc.

153/ 1, A117-A121
2005




72 研究論文(学術雑誌)
共著
Preparation and proton conductivity of monodisperse nanocrystals of pyrochlore-type antimonic acid and its niobium-substituted materials.
Kiyoshi Ozawa, Masashi Hase, Mika Eguchi, Hitoshi Yamaguchi, Hiroaki Nakamura and Yoshio Sakka
Electrochimica Acta

50/ 16-17, pp.3205-3209
2005




73 研究論文(国際会議プロシーディングス)
共著
Electrochemical Characteristics of Direct Dimethyl Ether Fuel Cells Using Pt and Pt-Ru Catalyst.
Mika EGUCHI, Satoshi UEDA, Katsuhiro UNO and Yasuyuki TSUTSUMI
SSI-15 International Conference on Solid State Ionics,
Baden-Baden, Germany


2005/07/17




74 研究論文(国際会議プロシーディングス)

Structural and Electrochemical Properties of Layered Oxides of LixVyO2 (x=0.86-1.0, y=0.8-1.0)
Kiyoshi OZAWA, Mika EGUCHI, Hiroki Fujii, Katsuhiro Uno
SSI-15 International Conference on Solid State Ionics,
Baden-Baden, Germany


2005/07/17




75 研究論文(国際会議プロシーディングス)
共著
Hydrothermal preparation of a layered material of LixVyO2 (x=0.86 and y=0.8) and its electrochemical properties.
K. Ozawa, H. Fujii, L. Wang, M. Eguchi, H. Yamaguchi, and Y. Sakka
The MRS Spring Meeting
San Francisco, USA,


2005/03/28




76 研究論文(学術雑誌)
共著
Bismuth-doping effect on structural properties and proton conductivity of pyrochlore-type antimonic acid
Kiyoshi Ozawa, Mika Eguchi, Hiroaki Nakamura and Yoshio Sakka
Solid State Ionics

172, pp.109-112
2004




77 研究論文(国際会議プロシーディングス)
共著
Electrochemical characteristics of Direct Dimethyl ether Fuel Cells.
Satoshi UEDA, Mika EGUCHI, Katsuhiro UNO and Yasuyuki TSUTSUMI
196th Meeting of The Electrochemical Society.
Honolulu, Hawaii, USA,

pp.1958
2004/10/03




78 研究論文(国際会議プロシーディングス)
共著
Characteristics of (V1-yMoy)2O5(y=0.25) as a Lithium Insertion Host.
Mika EGUCHI, Fumihiko MAKI, Satomi IWABE and Yoshihiro MOMOSE
55th Annual Meeting of International Society of Electrochemistry,
Tessaloniki, Greece


2004/09/19




79 研究論文(国際会議プロシーディングス)
共著
Electrodeposition of chromium from chromium(III) sulphate solutions.
Mika EGUCHI, Yuji KOMAGINE, Ryuichiro YAJIMA, Yohei SASAZAKI and Yoshihiro MOMOSE
55th Annual Meeting of International Society of Electrochemistry,
Tessaloniki, Greece


2004/09/19




80 研究論文(国際会議プロシーディングス)
共著
Preparation and lithium insertion property of layered LixV2O5.
Mika EGUCHI and Kiyoshi OZAWA
55th Annual Meeting of International Society of Electrochemistry,
Tessaloniki, Greece


2004/09/19




81 研究論文(国際会議プロシーディングス)

Conduction Properties of Niobium-Substituted Pyrochlore-Type Antimonic Acids.
Kiyoshi Ozawa, Masashi Hase, Mika Eguchi, Hitoshi Yamaguchi, Hiroaki Nakamura and Yoshio Sakka
55th Annual Meeting of International Society of Electrochemistry, Tessaloniki, Greece


2004/09/19




82 研究論文(学術雑誌)
共著
Low-temperature preparation of lithium vanadium oxides by solution processing
Kiyoshi OZAWA, Mika EGUCHI and Yoshio SAKKA
J. European.Ceramics. Soc

24/ 2, pp.405-408
2003




83 研究論文(学術雑誌)
共著
Preparation and lithium insertion property of layered LixV2O5·H2O
Mika EGUCHI , Kiyoshi OZAWA and Yoshio Sakka
J. Power Sources

119-121, pp.201-204
2003




84 研究論文(国際会議プロシーディングス)
共著
Doping Effect of Yttrium, Niobium, and Bismuth on Structural and Conduction Properties of Pyrochlore-Type Antimonic Acid.
Kiyoshi Ozawa, Junhu Wang, Mika Eguchi, Yoshio Sakka
XVth International Symposium on the Reactivity of Solids,
Kyoto, Japan


2003/11/09




85 研究論文(国際会議プロシーディングス)
共著
Doping Effects of Yttrium and Niobium on Conductivity in Pyrochlore-Type Antimonic Acid.
Kiyoshi Ozawa,Junhu Wang,Mika Eguchi, Yoshio Sakka
European Congress on Advanced Materials and Progress (EUROMAT 2003), Lausanne, switzerland


2003/09/01




86 研究論文(学術雑誌)
共著
Preparation and Electrochemical Properties of Li-V Oxides by the Reaction of an Aqueous Hydrogen Peroxide Solution with Metal Alkoxides
Kiyoshi OZAWA, Mika EGUCHI and Yoshio SAKKA
Transactions of the Materials Research Society of Japan

27, pp.81-84
2002




87 研究論文(国際会議プロシーディングス)
共著
A new preparation process of Li-V oxides.
Kiyoshi OZAWA, Mika EGUCHI and Yoshio SAKKA
8th International Conference on Ceramic Processing Science (8th ICCPS)
Humburg, Germany


2002/09/02




88 研究論文(国際会議プロシーディングス)
共著
Preparation and lithium insertion property of layered LixV2O5.
Mika EGUCHI and Kiyoshi OZAWA
11th International Meeting on Lithium Batteries, Monterey, USA


2002/06/23




89 研究論文(学術雑誌)
共著
Cyclic voltanmmetry for the study of the corrosion protection of plasma polymeried coatings on metal surfaces.
Y. CHEN, K. KIKUCHI, K. CHINONE, M. EGUCHI and Y. MOMOSE
J. Adhesion Sci. Technol

15/ 3, pp.371-391
2001




90 研究論文(学術雑誌)
共著
Lithium Insertion of (V1-yMoy)2O5.
Mika EGUCHI, Fumihiko MAKI, Satomi IWABE and Yoshihiro MOMOSE
J. Power Sources

97-98, pp.548-550
2001




91 研究論文(国際会議プロシーディングス)
共著
過酸化水素と金属アルコキシドの反応から作製したLi-V酸化物の電気化学的性質
Kiyoshi OZAWA, Mika EGUCHI and Yoshio SAKKA
13th Meeting of The Materials Research Society of Japan
Kawasaki, Japan


2001/12/20




92 研究論文(国際会議プロシーディングス)
共著
Electrodeposition of chromium from chromium(III) sulphate solutions.
Mika EGUCHI, Yuji KOMAGINE and Yoshihiro MOMOSE
200th Meeting of The Electrochemical Society
San Francisco, USA


2001/09/02




93 研究論文(国際会議プロシーディングス)
共著
Sol-Gel Preparation of Li-V Oxides.
Kiyoshi OZAWA, Mika EGUCHI and Yoshio SAKKA
200th Meeting of The Electrochemical Society
San Francisco, USA


2001/09/02




94 (MISC)総説・解説(大学・研究所紀要)
共著
ミクロ細孔の制御と利用に関する基礎研究
目 義雄,小澤 清,打越哲郎,鈴木 達,大野 悟,奥山秀男,江口美佳,Benjamin Hatton,袖山研一
科学技術庁 金属材料技術研究所,研究報告集22


2000




95 研究論文(国際会議プロシーディングス)
共著
Lithiation Behaviour of Vanadium Molybdenum Oxide
M. Eguchi, F. Maki, H. Kimura and K. Takahashi
Proc. of Symposium on Intercalation Compounds for Battery Materials, Honolulu, Hawaii, Annual Fall Meeting of ECS 1999

pp.230
2000




96 研究論文(学術雑誌)
共著
Lithiation Behaviour of Vanadium Molybdenum Oxides.
Mika EGUCHI, Fumihiko MAKI, Hatomi KIMURA, Kazuhiro TAKAHASHI and Yoshihiro MOMOSE
Electrochemistry

68, pp.474-477
2000




97 研究論文(国際会議プロシーディングス)
共著
ESR Spectral Observation of Lithium Insertion Behaviour of Vanadium Molybdenum Oxide.
Mika EGUCHI, Fumihiko MAKI, Satomi IWABE and Yoshihiro MOMOSE
Materials Research Society 2000 Fall Meeting
Boston, USA


2000/11/27




98 研究論文(国際会議プロシーディングス)
共著
Lithium Insertion of (V1-yMoy)2O5.
Mika EGUCHI, Fumihiko MAKI, Satomi IWABE and Yoshihiro MOMOSE
10th International Meeting on Lithium Batteries.
Como, Italy


2000/05/28




99 研究論文(学術雑誌)
共著
Lithium Insertion Behaviour of (H3N(CH2)3NH3)[V4O10].
Mika EGUCHI, Kiyoshi OZAWA, Yoshio SAKKA and Tomiya KISHI
粉体および粉末冶金

46, pp.305-311
1999




100 研究論文(国際会議プロシーディングス)
共著
Lithiation Behaviour of Vanadium Molybdenum Oxide.
Mika EGUCHI, Fumihiko MAKI, Hatomi KIMURA, Kazuhiro TAKAHASHI and Yoshihiro MOMOSE
196th Meeting of The Electrochemical Society.
Honolulu, Hawaii, USA


1999/10/17




101 研究論文(学術雑誌)
共著
Characteristics of d-AgyV2O5 as a lithium insertion host.
Jin KAWAKITA, Hiroko SASAKI, Mika EGUCHI, Takashi MIURA and Tomiya KISHI
J. Power sources

70, pp.28-33
1998




102 研究論文(学術雑誌)
共著
Lithium Insertion Behaviour of a-CuVO3.
Mamiko KAMIYA, Mika EGUCHI, Takashi MIURA and Tomiya KISHI
Solid State Ionics

109, pp.321-326
1998




103 研究論文(学術雑誌)
共著
Lithiation characteristics of FeVO4.
Masatoshi HAYASHIBARA, Mika EGUCHI, Takashi MIURA and Tomiya KISHI
Solid State Ionics

98, pp.119
1997




104 研究論文(国際会議プロシーディングス)
共著
Electrochemical Property of (H3N(CH2)3NH3)[V4O10] as a Lithium Insertion Host.
Mika EGUCHI, Kiyoshi OZAWA and Yoshio SAKKA
IUMRS-ICA-97, Makuhari, Japan

pp.538
1997/09/16




105 (MISC)総説・解説(その他)
単著
新規層状バナジウム酸化物の合成
江口美佳
化学と工業

49/ 11, pp.1577
1996




106 研究論文(学術雑誌)
共著
Lithiation characteristics of Cu5V2O10.
Mika EGUCHI, Ayako KOMAMURA, Takashi MIURA and Tomiya KISHI
Electrochimica Acta

41/ 6, pp.857-861
1996




107 研究論文(学術雑誌)
共著
Lithiation characteristics of a-CuV2O6 and Other nCuO·V2O5 Oxides.
Mika EGUCHI, Takuji IWAMOTO, Takashi MIURA and Tomiya KISHI
Solid State Ionics

89, pp.109-116
1996




108 研究論文(国際会議プロシーディングス)
共著
Lithiation Behaviour of Silver-Vanadium Oxides.
Jin KAWAKITA, Hiroko SASAKI, Mika EGUCHI, Takashi MIURA and Tomiya KISHI,
46th Annual Meeting of International Society of Electrochemistry,
Veszprém, Hungary


1996/09/01




109 研究論文(国際会議プロシーディングス)
共著
Lithiation Behaviour of Iron(III)-Vanadium (IV, V) Oxides.
Masatoshi HAYASHIBARA, Mika EGUCHI, Takashi MIURA and Tomiya KISHI
46th Annual Meeting of International Society of Electrochemistry,
Veszprém, Hungary


1996/09/01




110 (MISC)総説・解説(その他)
共著
酸化バナジウム正極のリチウム挿入反応.
岸 富也,江口美佳
化学工業

46/ 11, pp.46-54
1995




111 研究論文(国際会議プロシーディングス)
共著
Lithiation Behaviour of Copper(II) Vanadates.
Mika EGUCHI, Mayumi IWATANI, Takashi MIURA and Tomiya KISHI
'95 Asian Conference on Electrochemistry, Suita, Osaka

pp.206
1995/05/28




112 研究論文(学術雑誌)
共著
Lithium insertion characteristics of b-Cu2V2O7.
Mika EGUCHI, Ikuko FURUSAWA, Takashi MIURA and Tomiya KISHI
Solid State Ionics

68, pp.159-164
1994




113 研究論文(学術雑誌)
共著
ESR Spectral Observation of Lithiation Behaviour of a-Zn2V2O7 and Cu2V2O7.
Mika EGUCHI, Takashi MIURA and Tomiya KISHI
Denki Kagaku

62/ 6, pp.504-507
1994




114 研究論文(学術雑誌)
共著
Lithiation characteristics of Cu11V6O26.
Mika EGUCHI, Takeshi YOKOYAMA, Takashi MIURA and Tomiya KISHI
Solid State Ionics

74, pp.269-274
1994




115 研究論文(国際会議プロシーディングス)
共著
Lithiation Characteristics of the Complex Oxides nCuO·V2O5
Mika EGUCHI, Takashi MIURA and Tomiya KISHI
45th Annual Meeting of International Society of Electrochemistry,
Porto, Portugal

pp.VII-35
1994/08/28




116 研究論文(学術雑誌)
共著
Lithium Insertion Characteristics of a-Cu2V2O7.
Mika EGUCHI, Maki YAMAGUCHI, Takashi MIURA and Tomiya KISHI
Denki Kagaku

61/ 12, pp.1347-1351
1993




117 研究論文(国際会議プロシーディングス)
共著
Lithium Insertion Characteristics of Cu2V2O7 and Related Oxides.
Mika EGUCHI, Maki YAMAGUCHI, Ikuko FURUSAWA, Takashi MIURA and Tomiya KISHI
44th Annual Meeting of International Society of Electrochemistry, Berlin, Germany

pp.425
1993/09/05




118 研究論文(学術雑誌)
共著
Lithium insertion characteristics of a-phase NayV2O5.
Mika EGUCHI, Yasihisa MURANUSI, Takashi MIURA and Tomiya KISHI
Solid State Ionics

57, pp.307-310
1992