Strontium Titanate-based Composite Anodes for Solid Oxide Fuel Cells

Peter Blennow Tullmar; Kent Kammer Hansen; L.R. Wallenberg; Mogens Bjerg Mogensen

doi:10.1149/1.3050390

Strontium Titanate-based Composite Anodes for Solid Oxide Fuel Cells

Peter Blennow Tullmar, Kent Kammer Hansen, L.R. Wallenberg, Mogens Bjerg Mogensen

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Abstract

Surfactant-assisted infiltration of Gd-doped ceria (CGO) in Nb-doped SrTiO3 (STN) was investigated as a potential fuel electrode for solid oxide fuel cells (SOFC). An electronically conductive backbone structure of STN was first fabricated at high temperatures and then combined with the mixed conducting and electrochemically active nano-sized CGO phase at low temperatures. Symmetrical cell measurements at open circuit voltage (OCV), showed that the electrochemical activity was maintained or even improved compared to Ni/YSZ fuel electrodes. The novel electrode had an electrode polarization resistance of 0.12 Omegacm2 and 0.44 Omegacm2 in humidified H2 at 850 ºC and 650 ºC, respectively. In addition, the ceramic composite electrode was shown to be redox stable. The electrode was actually activated with redox cycles at 650 ºC. The ceramic electrode structure thus presents a potential solution to overcome some of the major limitations of the current Ni-YSZ cermet SOFC anodes.

Original language	English
Journal	ECS Transactions
Volume	13
Issue number	26
Pages (from-to)	181-194
ISSN	1938-5862
DOIs	https://doi.org/10.1149/1.3050390
Publication status	Published - 2008
Event	213th ECS Meeting: B6 - Ionic and Mixed Conducting Ceramics 6 - Phoenix Convention Center, Phoenix, AZ, United States Duration: 18 May 2008 → 23 May 2008 Conference number: 213th http://www.electrochem.org/meetings/biannual/213/213.htm

Conference

Conference	213th ECS Meeting
Number	213th
Location	Phoenix Convention Center
Country/Territory	United States
City	Phoenix, AZ
Period	18/05/2008 → 23/05/2008
Internet address	http://www.electrochem.org/meetings/biannual/213/213.htm

Bibliographical note

Copyright The Electrochemical Society, Inc. [2008]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).

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@inproceedings{04054301e19844889ffd0c66bc638b66,

title = "Strontium Titanate-based Composite Anodes for Solid Oxide Fuel Cells",

abstract = "Surfactant-assisted infiltration of Gd-doped ceria (CGO) in Nb-doped SrTiO3 (STN) was investigated as a potential fuel electrode for solid oxide fuel cells (SOFC). An electronically conductive backbone structure of STN was first fabricated at high temperatures and then combined with the mixed conducting and electrochemically active nano-sized CGO phase at low temperatures. Symmetrical cell measurements at open circuit voltage (OCV), showed that the electrochemical activity was maintained or even improved compared to Ni/YSZ fuel electrodes. The novel electrode had an electrode polarization resistance of 0.12 Omegacm2 and 0.44 Omegacm2 in humidified H2 at 850 ºC and 650 ºC, respectively. In addition, the ceramic composite electrode was shown to be redox stable. The electrode was actually activated with redox cycles at 650 ºC. The ceramic electrode structure thus presents a potential solution to overcome some of the major limitations of the current Ni-YSZ cermet SOFC anodes.",

keywords = "Br{\ae}ndselsceller og brint",

author = "{Blennow Tullmar}, Peter and {Kammer Hansen}, Kent and L.R. Wallenberg and Mogensen, {Mogens Bjerg}",

note = "Copyright The Electrochemical Society, Inc. [2008]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).; 213th ECS Meeting : B6 - Ionic and Mixed Conducting Ceramics 6 ; Conference date: 18-05-2008 Through 23-05-2008",

year = "2008",

doi = "10.1149/1.3050390",

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TY - GEN

T1 - Strontium Titanate-based Composite Anodes for Solid Oxide Fuel Cells

AU - Blennow Tullmar, Peter

AU - Kammer Hansen, Kent

AU - Wallenberg, L.R.

AU - Mogensen, Mogens Bjerg

N1 - Conference code: 213th

PY - 2008

Y1 - 2008

N2 - Surfactant-assisted infiltration of Gd-doped ceria (CGO) in Nb-doped SrTiO3 (STN) was investigated as a potential fuel electrode for solid oxide fuel cells (SOFC). An electronically conductive backbone structure of STN was first fabricated at high temperatures and then combined with the mixed conducting and electrochemically active nano-sized CGO phase at low temperatures. Symmetrical cell measurements at open circuit voltage (OCV), showed that the electrochemical activity was maintained or even improved compared to Ni/YSZ fuel electrodes. The novel electrode had an electrode polarization resistance of 0.12 Omegacm2 and 0.44 Omegacm2 in humidified H2 at 850 ºC and 650 ºC, respectively. In addition, the ceramic composite electrode was shown to be redox stable. The electrode was actually activated with redox cycles at 650 ºC. The ceramic electrode structure thus presents a potential solution to overcome some of the major limitations of the current Ni-YSZ cermet SOFC anodes.

AB - Surfactant-assisted infiltration of Gd-doped ceria (CGO) in Nb-doped SrTiO3 (STN) was investigated as a potential fuel electrode for solid oxide fuel cells (SOFC). An electronically conductive backbone structure of STN was first fabricated at high temperatures and then combined with the mixed conducting and electrochemically active nano-sized CGO phase at low temperatures. Symmetrical cell measurements at open circuit voltage (OCV), showed that the electrochemical activity was maintained or even improved compared to Ni/YSZ fuel electrodes. The novel electrode had an electrode polarization resistance of 0.12 Omegacm2 and 0.44 Omegacm2 in humidified H2 at 850 ºC and 650 ºC, respectively. In addition, the ceramic composite electrode was shown to be redox stable. The electrode was actually activated with redox cycles at 650 ºC. The ceramic electrode structure thus presents a potential solution to overcome some of the major limitations of the current Ni-YSZ cermet SOFC anodes.

KW - Brændselsceller og brint

U2 - 10.1149/1.3050390

DO - 10.1149/1.3050390

M3 - Conference article

SN - 1938-5862

VL - 13

SP - 181

EP - 194

JO - ECS Transactions

JF - ECS Transactions

IS - 26

T2 - 213th ECS Meeting

Y2 - 18 May 2008 through 23 May 2008

ER -

Strontium Titanate-based Composite Anodes for Solid Oxide Fuel Cells

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Conference

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