Composite cathodes of La0.9Ca0.1Ni0.5Co0.5O3-Ce0.8Sm0.2O1.9 for solid oxide fuel cells

被引：5

作者：

Fu, Yen-Pei ^{[1
]}

Tsai, Feng-Yi ^{[1
]}

机构：

[1] Natl Dong Hwa Univ, Dept Mat Sci & Engn, Shoufeng 97401, Hualien, Taiwan

来源：

CERAMICS INTERNATIONAL | 2011年 / 37卷 / 01期

关键词：

Powders: solid state reaction; Electrical conductivity; Fuel cells; OXYGEN REDUCTION; ELECTROCHEMICAL PERFORMANCE; ELECTROLYTE; LA; FILM;

D O I：

10.1016/j.ceramint.2010.09.024

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

081705 [工业催化]; 082905 [生物质能源与材料];

摘要：

The mixed ionic and electronic conductors of La0.9Ca0.5Ni0.5Co0.5O3-Ce0.8Sm0.2O1.9 (LCNC-SDC) are investigated systematically for potential application as a cathode for solid oxide fuel cells based on a Ce0.8Sm0.2O1.9 (SDC) electrolyte. The electrochemical impedance spectroscopy (EIS) measurements are performed in air over the temperature range of 600-850 degrees C to determine the cathode polarization resistance. The exchange current densities for oxygen reduction reaction (ORR), determined from the low-field cyclic voltammetry, high-field cyclic voltammetry, and EIS data are systematically investigated. The activation energies (Ea) for ORR determined from the slope of Arrhenius plots are in the range of 102.33-150.73 kJ mol(-1) for LCNC SDC composite cathodes. The experimental results found that LCNC SDC (70:30) composite cathode has a maximum exchange current density and a minimum polarization resistance of 0.30 Omega cm(2) for 850 degrees C among LCNC-SDC composite cathodes. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：231 / 239

页数：9

共 40 条

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