In situ observations of microstructural changes in SOFC anodes during redox cycling

被引：79

作者：

Klemenso, T. ^{[1
]}

Appel, C. C.

Mogensen, M.

机构：

[1] Riso Natl Lab, Fuel Cells & Solid State Chem Dept, DK-4000 Roskilde, Denmark

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

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

[4] Haldor Topsoe Res Labs, DK-2800 Lyngby, Denmark

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2006年 / 9卷 / 09期

关键词：

D O I：

10.1149/1.2214303

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The anode-supported solid oxide fuel cell (SOFC) degrades when the anode is subjected to redox cycling. The degradation has qualitatively been related to microstructural changes in the nickel-yttria stabilized zirconia anode of the tested cells. In this work, the microstructural changes were observed in situ using environmental scanning electron microscopy. In the reduced state, a dynamic rounding of the nickel particles occurred. The oxide growth upon re-oxidation depended on the oxidation kinetics. During rapid oxidation, the NiO particles divided into 2-4 particles, which grew into the surrounding voids. For slower oxidation, an external oxide layer was seen to develop around the individual particles. (c) 2006 The Electrochemical Society.

引用

页码：A403 / A407

页数：5

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