Performance of Co-Ni-O spinel oxide coating on AISI 430 stainless steel as interconnect for intermediate temperature solid oxide fuel cell
Performance of Co-Ni-O spinel oxide coating on AISI 430 stainless steel as interconnect for intermediate temperature solid oxide fuel cell
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AISI 430 不锈钢上的 Co-Ni-O 尖晶石氧化物涂层作为中温固体氧化物燃料电池互连件的性能
DOI：
10.1016/j.ijhydene.2017.03.217
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发表时间：
2017-04-27
影响因子：
7.2
通讯作者：
Sun, Juncai
中科院分区：
文献类型：
--
作者：
Cheng, Fupeng;Cui, Jinlong;Sun, Juncai
为了降低作为中温固体氧化物燃料电池（SOFC）互连件的AISI 430不锈钢（430 SS）的氧化物生长动力学、保持合适的导电性并防止Cr挥发，使用简单且廉价的工艺在430 SS试样上成功地制备了Co-Ni-O尖晶石氧化物保护涂层，该工艺包括两个步骤：1）电镀Co-Ni合金层; 2）预氧化处理，将Co-Ni合金转化为尖晶石氧化物。在430 SS（Co-Ni-O 430 SS）上的Co-Ni-O尖晶石层致密且均匀，厚度为8-10 μ m。Co-Ni-O尖晶石氧化物保护涂层主要由面心立方（fcc）NiCo 2 O 4尖晶石相和少量fcc NiO相组成。与裸430 SS相比，Co-Ni-O 430 SS在模拟典型SOFC工作阴极条件（800 ℃空气中）下的抗氧化性和电导率得到了显著提高。在800 ℃恒温氧化试验后，Co-Ni-O 430 SS的面积比电阻（ASR）（100 h为0.1 Ω cm（2），600 h为0.9 Ω cm（2））比裸430 SS（100 h为1.2 Ω cm（2），600 h为2.4 Ω cm（2））低得多且稳定。Co-Ni-O 430 SS的这些性能意味着它可以作为固体氧化物燃料电池的候选连接体。(C)2017年氢能出版有限责任公司。由爱思唯尔有限公司出版。保留所有权利。
In order to decrease oxide growth kinetics, maintain suitable conductivity and prevent Cr-volatilization of AISI 430 stainless steels (430 SS) as the interconnect for intermediate temperature solid oxide fuel cells (SOFCs), a Co-Ni-O spinel oxide protective coating has been successfully fabricated on the 430 SS specimen using a simple and cheap process with two steps: 1) electroplation of Co-Ni alloy layer and 2) pre-oxidation treatment to convert the Co-Ni alloy into spinel oxide. The Co-Ni-O spinel layer on the 430 SS (Co-Ni-O 430 SS) is dense and uniform with 8-10 mu m thickness. And the Co-Ni-O spinel oxide protective coating consists of a main face-centered-cubic (fcc) NiCo2O4 spinel phase and a minor fcc NiO phase. Compared with bare 430 SS, the oxidation resistance and the conductivity of the Co-Ni-O 430 SS have been improved remarkably under simulated typical SOFC operating cathode conditions (at 800 C-omicron in air). After an isothermal oxidation test at 800 C-omicron, the area specific resistance (ASR) of Co-Ni-O 430 SS is much lower and stable (0.1 Omega cm(2) for 100 h and 0.9 Omega cm(2) for 600 h) than that of bare 430 SS (1.2 Omega cm(2) for 100 h and 2.4 Omega cm(2) for 600 h). These performances of Co-Ni-O 430 SS imply that it can be a promising candidate interconnect for solid oxide fuel cell. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.