High-performance perovskite Ba0.5Sr0.5Co0.8Fe0.1Zn0.1O3 - δ- La0.6Sr0.4Co0.2Fe0.8O3 - δ composite cathode

被引：8

作者：

Jung, Doh Won ^{[1
]}

Kwak, Chan ^{[1
]}

Park, Hee Jung ^{[2
]}

Kim, Ju Sik ^{[1
]}

Ahn, Sung-Jin ^{[1
]}

Yeon, Dong-Hee ^{[1
]}

Seo, Sooyeon ^{[1
]}

Moon, Kyeong-Seok ^{[1
]}

Lee, Sang Mock ^{[1
]}

机构：

[1] SAIT, Mat Res Ctr, Suwon 443803, South Korea

[2] Daejeon Univ, Dept Adv Mat Engn, Daejeon 300716, South Korea

来源：

SCRIPTA MATERIALIA | 2016年 / 113卷

基金：

美国国家卫生研究院; 美国国家科学基金会;

关键词：

Composite cathode; Solid-oxide fuel cell; Electrical conductivity; Polarization resistance; Long-term stability; OXIDE FUEL-CELLS; PERMEABLE MEMBRANE; DIFFUSION; EXPANSION;

D O I：

10.1016/j.scriptamat.2015.09.042

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A new composite oxide, Ba0.5Sr0.5Co0.8Fe0.1Zn0.1O3 - delta(-) La0.6Sr0.4Co0.2Fe0.8O3 - (delta), was investigated as a cathode material for intermediate-temperature solid-oxide fuel cells. The area-specific polarization resistance of the Ba0.5Sr0.5Co08Fe0.1Zn0.1O3 - (delta)- La0.6Sr0.4Co0.2Fe0.8O3 - (delta) composite cathode was extracted from the impedance spectrum of a symmetric cell employing two composite cathodes. Its value of 0.078 Omega cm(2) at 600 degrees C is similar to 64% lower than that of a Ba0.5Sr0.5Co0.8Fe0.1Zn0.1O3 - (delta) cathode (0.215 Omega cm(2)) and one order of magnitude lower than that of a La0.6Sr0.4Co0.2Fe0.8O3 - (delta) cathode (1.06 Omega cm(2)). Furthermore, it was determined that this composite cathode could maintain its long-term stability without microstructural change. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：59 / 62

页数：4

共 18 条

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