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金属学报  2009, Vol. 45 Issue (9): 1125-1129    
  论文 本期目录 | 过刊浏览 |
不锈钢双极板电弧离子镀Cr1-xNx薄膜改性研究
吴博1;  李红凯1;  林国强1; 付宇2; 候明2; 衣宝廉2
1) 大连理工大学三束材料改性实验室; 大连 116085 2) 中国科学院大连化学物理研究所燃料电池工程中心; 大连 116023
RESEARCH OF MODIFICATION OF STAINLESS STEEL BIPOLAR PLATES WITH Cr1-xNx FILMS DEPOSITED BY ARC ION PLATING
WU Bo1; LI Hongkai1; LIN Guoqiang1; FU Yu2; HOU Ming2; YI Baolian2
1) Lab of Material Modification by Laser; Ion; and Electron Beams; Dalian University of Technology; Dalian 116085 2) Fuel Cell R$\&$D Center; Dalian Institute of Chemical Physics; Chinese Academy of Sciences; Dalian 116023
引用本文:

吴博 李红凯 林国强 付宇 候明 衣宝廉. 不锈钢双极板电弧离子镀Cr1-xNx薄膜改性研究[J]. 金属学报, 2009, 45(9): 1125-1129.
, , . RESEARCH OF MODIFICATION OF STAINLESS STEEL BIPOLAR PLATES WITH Cr1-xNx FILMS DEPOSITED BY ARC ION PLATING[J]. Acta Metall Sin, 2009, 45(9): 1125-1129.

全文: PDF(1042 KB)  
摘要: 

用电弧离子镀方法在质子交换膜燃料电池(PEMFC)不锈钢双极板表面沉积一系列 Cr1-xNx(x=0.28-0.50)改性薄膜, 对薄膜的成分、相组成以及改性双极板的导电、耐蚀等性能进行了分析测试. 结果表明, 双极板的导电与耐蚀性能因沉积Cr1-xNx薄膜而显著提高, 并且与薄膜的成分和相组成密切相关: 当x值从0.28增加到0.50, 薄膜由Cr+Cr2N转变为Cr2N, 再转变为Cr2N+CrN, 最终变为CrN; 当薄膜由单相组成时, 双极板既导电又耐蚀、综合性能最好, 与原始不锈钢相比, 导电性能提高2个数量级以上, 而耐蚀性能提高近3个数量级.

关键词 质子交换膜燃料电池Cr-N膜不锈钢双极板电弧离子镀接触电阻 耐蚀性能    
Abstract

In the proton exchange membrane fuel cell (PEMFC) with widely applicated future, the bipolar plate plays an important role in supporting the cell stack, collecting current, separating the oxidants from fuels and channeling the oxidants and fuels. The ideal bipolar plate should be of good electric conductivity, high corrosion resistance, high mechanical strength, low gas permeability, low cost and easy processing. Although the stainless steels can be used as bipolar plate materials, their corrosion resistance in fuel cell environment is not satisfied, and the cations induced by metal corrosion would poison the proton exchange membrane. A series of Cr1-xNx (x=0.28-0.50) films were deposited on the surface of stainless steel by arc ion plating (AIP), the composition and phases of Cr1-xNx films and the electric conductivity and corrosion resistance of the modified bipolar plates were tested. The results show that as the value of x varying from 0.28 to 0.50, the phases in the films change from Cr+Cr2N to Cr2N, then to Cr2N+CrN and finally to CrN. The bipolar plates coated with the Cr1-xNx film with single phase structure show good electric conductivity and high corrosion resistance. Comparing with the original stainless steel, the electric conductivity and corrosion resistance of bipolar plates are enhanced by more two orders of magnitude and almost three orders of magnitude, respectively.

Key wordsproton exchange membrane fuel cell (PEMFC)    Cr-N film    stainless steel bipolar plate    arc
ion plating
   contact resistance    corrosion resistance
收稿日期: 2009-02-25     
ZTFLH: 

TG174.44

 
基金资助:

国家高技术研究发展计划资助项目2007AA03Z221

作者简介: 吴博, 男, 1981年生, 博士生

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