Proton exchange membrane fuel cell (PEMFC) powered automobiles have been recognized to be the ultimate solution to replace tra-ditional fuel automobiles because of their advantages of PEMFCs such as no pollution, low temperature start-up, high energy density, and low noise. As one of the core components, the bipolar plates (BPs) play an important role in the PEMFC stack. Traditional graphite BPs and com-posite BPs have been criticized for their shortcomings such as low strength, high brittleness, and high processing cost. In contrast, stainless steel BPs (SSBPs) have recently attracted much attention of domestic and foreign researchers because of their excellent comprehensive perform-ance, low cost, and diverse options for automobile applications. However, the SSBPs are prone to corrosion and passivation in the PEMFC working environment, which lead to reduced output power or premature failure. This review is aimed to summarize the corrosion and passiva-tion mechanisms, characterizations and evaluation, and the surface modification technologies in the current SSBPs research. The non-coating and coating technical routes of SSBPs are demonstrated, such as substrate component regulation, thermal nitriding, electroplating, ion plating, chemical vapor deposition, and physical vapor deposition, etc. Alternative coating materials for SSBPs are metal coatings, metal nitride coat-ings, conductive polymer coatings, and polymer/carbon coatings, etc. Both the surface modification technologies can solve the corrosion resist-ance problem of stainless steel without affecting the contact resistance, however still facing restraints such as long-time stability, feasibility of low-cost, and mass production process. This paper is believed to enrich the knowledge of high-performance and long-life BPs applied for PEMFC automobiles.

State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Department of Chemical and Biological Engineering,University of British Columbia,2360 East Mall,Vancouver,BC V6T 1Z3,Canada

[1]Gaoyang Liu;Faguo Hou;Shanlong Peng;Xindong Wang;Baizeng Fang-.Process and challenges of stainless steel based bipolar plates for proton exchange membrane fuel cells)[J].矿物冶金与材料学报,2022(05):1099-1119

SSBPs

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