Ca3-xLaxCo4O9+δ (x=0, 0.3): New cobaltite materials as cathodes for proton conducting solid oxide fuel cell

被引：13

作者：

Ben Yahia, Hamdi ^{[1
]}

Mauvy, Fabrice ^{[1
]}

Grenier, Jean Claude ^{[1
]}

机构：

[1] Univ Bordeaux, CNRS, ICMCB, F-33608 Pessac, France

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2010年 / 183卷 / 03期

关键词：

Layered cobaltite oxide; Cathode; Proton conductor; PCFC; Y-doped BaCeO3; THERMOELECTRIC PROPERTIES; SYSTEM; POLARIZATION; CERAMICS; CA3CO4O9; LA;

D O I：

10.1016/j.jssc.2009.12.014

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Misfit-type Ca3-xLaxCo4O9+delta (x=0, 0.3) oxides were synthesised to be evaluated as possible cathode materials for proton conducting fuel cells (PCFCs) based on BaCe0.9Y0.1O3-delta (BCY10) dense ceramic electrolyte. The electrical conductivity value of Ca2.7La0.3Co4O9+delta (sigma approximate to 53 S cm(-1) at 600 degrees C) is in the range of usually required value for a cathode application (about 50-100 S cm(-1)) In order to test the performance of each compound as cathode material, impedance measurements were carried out on Ca3-xLaxCo4O9+delta/BaCe0.9Y0.1O3-delta/Ca3-xLaxCo4O9+delta symmetrical half cells over the temperature range 400-800 degrees C under wet air -A promising electrocatalytic activity has been observed with both compounds Ca3Co4O9+delta and Ca271-ao3C0409,5 Factually, the area specific resistance obtained was about 2 2 Omega cm(2) at 600 degrees C (C) 2010 Elsevier Inc All rights reserved.

引用

页码：527 / 531

页数：5

共 21 条

[1] MODELING OF LINE-SHAPE ASYMMETRY IN POWDER DIFFRACTION [J].