Electrochemical performance of oxide anode materials and catalytic effect of current collector

Keiji Yashiro; Takashi Nakamura; Atsushi Kaimai; Takanori Otake; Tatsuya Kawada; Junichiro Mizusaki

Electrochemical performance of oxide anode materials and catalytic effect of current collector

Keiji Yashiro, Takashi Nakamura, Atsushi Kaimai, Takanori Otake, Tatsuya Kawada, Junichiro Mizusaki

Tohoku University

Research output: Contribution to conference › Paper › peer-review

3 Citations (Scopus)

Abstract

In order to overcome the problems of SOFC anode such as carbon deposition and microstructural change by oxidation, it is desired to develop a reliable substitute for nickel/yttria stabilized zirconia cermet. Several kinds of oxide materials were tested as fuel electrode by means of impedance spectroscopy and steady state polarization measurements. These measurements confirmed that anode performance of Ce_0.9Gd_0.1O_1.95 and Ce _0.992Nb_0.008O₂ was good in humid hydrogen atmosphere. On the other hand, La_0.9Ca_0.1Cr _1-xAl_xO₃ (x=0.2, 0.8), SrZr _0.825Y_0.1Ru_0.075O₃ showed much poorer performance. The reaction kinetics of doped ceria was also investigated and it was revealed that doped ceria has almost the same dependence on gaseous partial pressure and temperature. A possible kinetic equation is proposed, though unclear points still remain.

Original language	English
Pages	1369-1375
Number of pages	7
Publication status	Published - 2005
Event	9th International Symposium on Solid Oxide Fuel Cells, SOFC IX - Quebec, Canada Duration: 2005 May 15 → 2005 May 20

Conference

Conference	9th International Symposium on Solid Oxide Fuel Cells, SOFC IX
Country/Territory	Canada
City	Quebec
Period	05/5/15 → 05/5/20

Cite this

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title = "Electrochemical performance of oxide anode materials and catalytic effect of current collector",

abstract = "In order to overcome the problems of SOFC anode such as carbon deposition and microstructural change by oxidation, it is desired to develop a reliable substitute for nickel/yttria stabilized zirconia cermet. Several kinds of oxide materials were tested as fuel electrode by means of impedance spectroscopy and steady state polarization measurements. These measurements confirmed that anode performance of Ce0.9Gd0.1O1.95 and Ce 0.992Nb0.008O2 was good in humid hydrogen atmosphere. On the other hand, La0.9Ca0.1Cr 1-xAlxO3 (x=0.2, 0.8), SrZr 0.825Y0.1Ru0.075O3 showed much poorer performance. The reaction kinetics of doped ceria was also investigated and it was revealed that doped ceria has almost the same dependence on gaseous partial pressure and temperature. A possible kinetic equation is proposed, though unclear points still remain.",

author = "Keiji Yashiro and Takashi Nakamura and Atsushi Kaimai and Takanori Otake and Tatsuya Kawada and Junichiro Mizusaki",

year = "2005",

language = "English",

pages = "1369--1375",

note = "9th International Symposium on Solid Oxide Fuel Cells, SOFC IX ; Conference date: 15-05-2005 Through 20-05-2005",

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TY - CONF

T1 - Electrochemical performance of oxide anode materials and catalytic effect of current collector

AU - Yashiro, Keiji

AU - Nakamura, Takashi

AU - Kaimai, Atsushi

AU - Otake, Takanori

AU - Kawada, Tatsuya

AU - Mizusaki, Junichiro

PY - 2005

Y1 - 2005

N2 - In order to overcome the problems of SOFC anode such as carbon deposition and microstructural change by oxidation, it is desired to develop a reliable substitute for nickel/yttria stabilized zirconia cermet. Several kinds of oxide materials were tested as fuel electrode by means of impedance spectroscopy and steady state polarization measurements. These measurements confirmed that anode performance of Ce0.9Gd0.1O1.95 and Ce 0.992Nb0.008O2 was good in humid hydrogen atmosphere. On the other hand, La0.9Ca0.1Cr 1-xAlxO3 (x=0.2, 0.8), SrZr 0.825Y0.1Ru0.075O3 showed much poorer performance. The reaction kinetics of doped ceria was also investigated and it was revealed that doped ceria has almost the same dependence on gaseous partial pressure and temperature. A possible kinetic equation is proposed, though unclear points still remain.

AB - In order to overcome the problems of SOFC anode such as carbon deposition and microstructural change by oxidation, it is desired to develop a reliable substitute for nickel/yttria stabilized zirconia cermet. Several kinds of oxide materials were tested as fuel electrode by means of impedance spectroscopy and steady state polarization measurements. These measurements confirmed that anode performance of Ce0.9Gd0.1O1.95 and Ce 0.992Nb0.008O2 was good in humid hydrogen atmosphere. On the other hand, La0.9Ca0.1Cr 1-xAlxO3 (x=0.2, 0.8), SrZr 0.825Y0.1Ru0.075O3 showed much poorer performance. The reaction kinetics of doped ceria was also investigated and it was revealed that doped ceria has almost the same dependence on gaseous partial pressure and temperature. A possible kinetic equation is proposed, though unclear points still remain.

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M3 - Paper

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SP - 1369

EP - 1375

T2 - 9th International Symposium on Solid Oxide Fuel Cells, SOFC IX

Y2 - 15 May 2005 through 20 May 2005

ER -

Electrochemical performance of oxide anode materials and catalytic effect of current collector

Abstract

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