SOFC连接体用STS444/Y合金的高温导电性能研究

中国腐蚀与防护学报, 2011, 31(5): 367-370.

SOFC连接体用STS444/Y合金的高温导电性能研究

1.1. 吉林化工学院理学院吉林 1320222. 北京科技大学材料科学与工程学院北京 100083>

1.1. School of Sciences, Jilin Institute of Chemical Technology, Jilin 1320222. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083>

基金项目: 吉林省科技发展计划项目(200705C10)资助

关键词：固体氧化物燃料电池 , metallic interconnect , area specific resistance , elevated temperature oxidation

ELEVATED TEMPERATURE ELECTRICAL CONDUCTIVITY OF STS444/Y ALLOY USED FOR SOFC INTERCONNECTS

JIN Guangxi , PAN Fenghong , LANG Cheng , QIAO Lijie

Keywords： solid oxide fuel cell , 金属连接体 , 面比电阻 , 高温氧化

以固体氧化物燃料电池(SOFC)金属连接体为研究对象，分析铁素体不锈钢STS444涂覆稀土元素Y后在750℃下的高温氧化和导电行为。利用辉光放电光谱（GDS）和二次离子质谱（SIMS）技术研究了主要元素(Fe，Cr，Mn，Si)和稀土元素Y 对氧化膜生长和高温导电性能的影响。结果表明，Y元素的活性元素效应使STS444/Y合金可以显著改善其抗氧化性和高温导电性，可作为SOFC金属连接体的候选材料。。

The aim of this study was to examine the oxidation behavior and electrical conductivities of ferritic stainless steels STS444 coated with element Y for planar SOFC (solid oxide fuel cells) interconnects at 750℃. The effects of the main elements (Fe,Cr,Mn and Si) and the rare earth element Y on the growth of oxide scale and the high temperature electrical conductivity of STS444 alloy were studied using glow discharge spectrometer （GDS） and secondary ion mass spectroscopy （SIMS） techniques. The results indicated that the reactive element effects of element Y improved noticeably the oxidation resistance and electrical conductivities, and it can be possibly used as the candidate material for the SOFC interconnects.

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