Electrochemical properties of perovskite and A2MO4-type oxides used as cathodes in protonic ceramic half cells

被引：46

作者：

Dailly, J. ^{[1
]}

Mauvy, F. ^{[1
]}

Marrony, M.

Pouchard, M. ^{[1
]}

Grenier, Jean-Claude ^{[1
]}

机构：

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

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2011年 / 15卷 / 02期

关键词：

SOFC-H+; Perovskite; K2NiF4-type oxides; Cathode material; Impedance spectroscopy; FUEL-CELLS; ELECTROLYTE; PERFORMANCE; SOFC;

D O I：

10.1007/s10008-010-1188-4

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Three selected materials have been prepared and shaped as cathode of half cells using the proton-conducting electrolyte BaCe0.9Y0.1O3 -aEuro parts per thousand delta (BCY10): two perovskite compounds, Ba0.5Sr0.5Co0.8Fe0.2O3 -aEuro parts per thousand delta (BSCF) and La0.6Sr0.4Fe0.8Co0.2O3 -aEuro parts per thousand delta (LSFC), and the praseodymium nickelate Pr2NiO4 + delta (PRN) having the K2NiF4-type structure. The electrochemical properties of these compounds have been studied under zero current conditions (two-electrode cell) and under polarization (three-electrode cell). Their measured area-specific resistances were about 1-2 Omega cm(2) at 600 A degrees C. Under direct current polarization, it appears that the three compounds show almost similar values of current densities at 625 A degrees C; however, at lower temperatures, BSCF appears to be the most efficient cathode material.

引用

页码：245 / 251

页数：7

共 18 条

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