Electrochemical properties of B-site Ni doped layered perovskite cathodes for IT-SOFCs

被引：30
作者：
Jun, Areum [1 ]
Lim, Tak-hyoung [3 ]
Shin, Jeeyoung [2 ]
Kim, Guntae [1 ]
机构：
[1] Ulsan Natl Inst Sci & Technol, Dept Energy Engn, Ulsan 689798, South Korea
[2] Dong Eui Univ, Dept Mech Engn, Pusan 614714, South Korea
[3] Korea Inst Energy Res, Hydrogen & Fuel Cell Dept, Taejon 305343, South Korea
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 35期
基金：
新加坡国家研究基金会;
关键词：
Solid oxide fuel cells (SOFCs); Layered perovskite; Cathode; Electrochemical performance; COMPOSITE CATHODES; PERFORMANCE; DIFFUSION; KINETICS; OXIDES; SR;
D O I：
10.1016/j.ijhydene.2014.06.136
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Offering fast oxygen reduction kinetics and high electrical conductivities relative to those of ABO(3)-type perovskite oxides, layered perovskite cathode materials have received considerable attention for intermediate temperature solid oxide fuel cells (IT-SOFCs). In this study, we have investigated the effects of Ni substitution for the Co site in SmBa0.5Sr0.5Co2O5+delta in terms of structural characteristics, electrical properties, and electrochemical performance of smBa(0.5)Sr(0.5)CO(2-x)Ni(x)O(5+delta) (x = 0, 0.1, and 0.2) in relation to its application as an IT-SOFC cathode material. At the given temperature, the electrical conductivities of SmBa0.5Sr0.3Co2-x NixO5+delta (x = 0, 0.1, and 0.2) decrease with increasing Ni content. For x = 0.1, the lowest ASR value, 0.125 Omega cm(2), and the highest single cell performance, 1.78 W cm(-2) at 600 degrees C, are obtained. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：20791 / 20798
页数：8
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