The Electrochemical and Thermal Performances of Ca3Co4O9-δ as a Cathode Material for IT-SOFCs

被引：4
|
作者：
Nagasawa, K. [1 ]
Mentre, O. [2 ]
Daviero-Minaud, S. [2 ]
Preux, N. [2 ]
Rolle, A. [2 ]
Nakatsugawa, H. [1 ]
机构：
[1] Yokohama Natl Univ, Grad Sch Engn, 79-5 Tokiwadai, Yokohama, Kanagawa 2408501, Japan
[2] UCCS, CNRS, UMR 8181, Ecole Nationale Super Chim Lille, F-59652 Villeneuve Dascq, France
来源：
SOLID OXIDE FUEL CELLS 11 (SOFC-XI) | 2009年 / 25卷 / 02期
关键词：
THERMOELECTRIC PROPERTIES; COBALT OXIDES; TEMPERATURE; ELECTROLYTES; TRANSPORT; CERIA;
D O I：
10.1149/1.3205820
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
With the aim of application for IT-SOFC cathode, two dimensional (2D) misfit layered calcium cobalt oxide Ca3Co4O9-delta was studied using XRD, SEM, thermal dilatometer, and impedance spectroscopy. Chemical reactivity of Ca3Co4O9-delta with electrolyte indicated good compatibility with CGO against generating impunity phase CaZrO3 with YSZ. Thermal expansion coefficient of pure Ca3Co4O9-delta exhibited 10.0-11.0 x 10(-6) K-1, which is similar to that of CGO electrolyte. Indeed, we verified a good adherence between electrode thin layer and the electrolyte. Electrochemical property of Ca3Co4O9-delta pellet showed good performances, i.e. ASR values are 3.0 and 24.5 Omega.cm(2) at 700 and 600 degrees C in ambient air respectively, in our experimental conditions.
引用
收藏
页码：2625 / 2630
页数：6
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