The mechanism behind redox instability of anodes in high-temperature SOFCs

被引：133

作者：

Klemenso, T ^{[1
]}

Chung, C

Larsen, PH

Mogensen, M

机构：

[1] Riso Natl Lab, Mat Res Dept, DK-4000 Roskilde, Denmark

[2] Tech Univ Denmark, Dept Chem, DK-2800 Lyngby, Denmark

[3] Topsoe Fuel Cell AS, DK-2800 Lyngby, Denmark

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2005年 / 152卷 / 11期

关键词：

D O I：

10.1149/1.2048228

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Bulk expansion of the anode upon oxidation is considered to be responsible for the lack of redox stability in high-temperature solid oxide fuel cells (SOFCs). The bulk expansion of nickel-yttria stabilized zirconia (YSZ) anode materials was measured by dilatometry as a function of sample geometry, ceramic component, temperature, and temperature cycling. The strength of the ceramic network and the degree of Ni redistribution appeared to be key parameters of the redox behavior. A model of the redox mechanism in nickel-YSZ anodes was developed based on the dilatometry data and macro- and microstructural observations. (c) 2005 The Electrochemical Society.

引用

页码：A2186 / A2192

页数：7

共 24 条

[1]

Aaberg R. J., 1996, Second European Solid Oxide Fuel Cell Forum. Proceedings, P363

[2] Ageing behaviour of zirconia stabilised by yttria and manganese oxide [J].

Appel, CC ;

Bonanos, N ;

Horsewell, A ;

Linderoth, S .

JOURNAL OF MATERIALS SCIENCE, 2001, 36 (18) :4493-4501

[3]

BAGGER C, 1992, FUEL CELL SEM COURT, P241

[4]

Carter G. A., 2003, Journal of the Australasian Ceramic Society, V39, P149

[5] The reduction of nickel-zirconia cermet anodes and the effects on supported thin electrolytes [J].

Cassidy, M ;

Lindsay, G ;

Kendall, K .

JOURNAL OF POWER SOURCES, 1996, 61 (1-2) :189-192

[6] Kinetics of oxidation and reduction of Ni/YSZ cermets [J].

Fouquet, D ;

Müller, AC ;

Weber, A ;

Ivers-Tiffée, E .

IONICS, 2003, 9 (1-2) :103-108

[7]

GRAHLMADSEN L, 2002, 5 EUR SOFC FOR, P82

[8]

Ihringer R., 2000, Fourth European Solid Oxide Fuel Cell Forum. Proceedings, P241

[9] Statistical geometry of reaction space in porous cermet anodes based on ion-conducting electrolytes - Patterns of degradation [J].

Ioselevich, A ;

Kornyshev, AA ;

Lehnert, W .

SOLID STATE IONICS, 1999, 124 (3-4) :221-237

[10] Degradation of solid oxide fuel cell anodes due to sintering of metal particles - Correlated percolation model [J].

Ioselevich, A ;

Kornyshev, AA ;

Lehnert, W .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1997, 144 (09) :3010-3019

← 1 2 3 →