A promising NiCo2O4 protective coating for metallic interconnects of solid oxide fuel cells

被引：66
|
作者：
Hua, Bin [1 ]
Zhang, Wenying [1 ]
Wu, Juan [1 ]
Pu, Jian [1 ]
Chi, Bo [1 ]
Jian, Li [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 21期
基金：
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词：
Solid oxide fuel cell; Metallic interconnect; Coating; Spinel; Area specific resistance; FERRITIC STAINLESS-STEELS; OXIDATION BEHAVIOR; CHROMIUM VAPORIZATION; CATHODE; SPINEL; ALLOYS; ATMOSPHERE; LA;
D O I：
10.1016/j.jpowsour.2010.05.031
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：
The NiCo2O4 spinel coating is applied onto the surfaces of the SUS 430 ferritic stainless steel by the sol-gel process; and the coated alloy, together with the uncoated as a comparison, is cyclically oxidized in air at 800 degrees C for 200 h. The oxidation behavior and oxide scale microstructure as well as the electrical property are characterized. The results indicate that the oxidation resistance is significantly enhanced by the protective coating with a parabolic rate constant of 8.1 x 10(-15) g(2) cm(-4) s(-1), while the electrical conductivity is considerably improved due to inhibited growth of resistive Cr2O3 and the formation of conductive spinel phases in the oxide scale. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：7375 / 7379
页数：5
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