Surface diffusion modification AISI 304SS stainless steel as bipolar plate material for proton exchange membrane fuel cell
Surface diffusion modification AISI 304SS stainless steel as bipolar plate material for proton exchange membrane fuel cell
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表面扩散改性AISI 304SS不锈钢作为质子交换膜燃料电池双极板材料
DOI：
10.1016/j.ijhydene.2011.02.072
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发表时间：
2012-01-01
影响因子：
7.2
通讯作者：
Ji, Shijun
中科院分区：
文献类型：
--
作者：
Wang, Jianli;Sun, Juncai;Ji, Shijun
铁基不锈钢因其成本低、易于冲压制造、良好的导热性和导电性而成为质子交换膜燃料电池（PEMFC）双极板的有前途的候选材料。本文将电镀Cr后真空炉热扩散的表面改性技术应用于AISI 304SS不锈钢，以提高界面接触电阻（ICR）和耐腐蚀性。在模拟PEMFC环境中进行动电位和恒电位极化等电化学测试，评估碳纸（扩散层）与样品之间的ICR。结果表明，与未处理的基体钢相比，ICR明显降低，耐腐蚀性能更好。高Cr表面的改性不锈钢可能更适合用于质子交换膜燃料电池的双极板。极化后，接触电阻有一定程度的增加。表面氮化物的形成正在进一步降低ICR。版权所有 (C) 2011，Hydrogen Energy Publications, LLC。由爱思唯尔有限公司出版。保留所有权利。
Fe-based stainless steels are the promising candidate materials for bipolar plate of proton exchange membrane fuel cell (PEMFC) due to low cost, ease stamping manufacture, good heat and electric conductivity. A surface modification technology of electroplating Cr followed by heat-diffusion in vacuum furnace is applied for AISI 304SS stainless steel in this paper to improve the Interfacial Contact Resistance (ICR) and corrosion resistance. The electrochemical tests such as potentiodynamic and potentiostatic polarization in the simulation PEMFC environments are carried out and the ICR between the carbon paper (diffusion layer) and the sample is evaluated. The results show that ICR is reduced markedly and corrosion resistance is better than the untreated substrate steel. The modified stainless steel with high Cr surface may be better candidate for the bipolar plates of PEMFC. After polarization, the contact resistance increased in some content. A surface nitride formation is under going on to lower the ICR further. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.