Improving the corrosion resistance and conductivity of 316L bipolar plates used for PEMFCs by applying Cr/CrN multilayer coating

IF 6.9 2区材料科学 Q2 CHEMISTRY, PHYSICAL Applied Surface Science Pub Date : 2025-01-30 DOI:10.1016/j.apsusc.2025.162573

Qiang Chen, Mingxu Su, Guodong Pang, Qiong Zhou, Dandan Liang, Ergeng Zhang

{"title":"Improving the corrosion resistance and conductivity of 316L bipolar plates used for PEMFCs by applying Cr/CrN multilayer coating","authors":"Qiang Chen, Mingxu Su, Guodong Pang, Qiong Zhou, Dandan Liang, Ergeng Zhang","doi":"10.1016/j.apsusc.2025.162573","DOIUrl":null,"url":null,"abstract":"Cr/CrN/Cr and CrN/Cr/CrN multilayer coatings, as well as CrN monolayer coating, were successfully prepared on 316L stainless steel by cathodic arc technique, and their corrosion resistance and conductivity were systematically investigated in simulated proton exchange membrane fuel cells (PEMFCs) environment. As a result, CrN/Cr/CrN and CrN coatings perform better corrosion resistance and durability than Cr/CrN/Cr coating. This is attributed to the superior chemical inertness and high compactness of CrN, which can block the penetration of the electrode effectively. All the coatings perform p-type semiconductors owing to the chromium oxides, and CrN/Cr/CrN coating shows the lowest acceptor density (NA) owing to limited carrier transport caused by the interface effects between layers. Moreover, CrN/Cr/CrN coating has the lowest interfacial contact resistance (ICR) after PSP tests, which is attributed to the good corrosion resistance of the outer CrN layer and the inner Cr layer with high electron mobility. This finding proves the potential application of Cr/CrN multilayer coating in PEMFCs.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"36 1","pages":""},"PeriodicalIF":6.9000,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Surface Science","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.apsusc.2025.162573","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Cr/CrN/Cr and CrN/Cr/CrN multilayer coatings, as well as CrN monolayer coating, were successfully prepared on 316L stainless steel by cathodic arc technique, and their corrosion resistance and conductivity were systematically investigated in simulated proton exchange membrane fuel cells (PEMFCs) environment. As a result, CrN/Cr/CrN and CrN coatings perform better corrosion resistance and durability than Cr/CrN/Cr coating. This is attributed to the superior chemical inertness and high compactness of CrN, which can block the penetration of the electrode effectively. All the coatings perform p-type semiconductors owing to the chromium oxides, and CrN/Cr/CrN coating shows the lowest acceptor density (N_A) owing to limited carrier transport caused by the interface effects between layers. Moreover, CrN/Cr/CrN coating has the lowest interfacial contact resistance (ICR) after PSP tests, which is attributed to the good corrosion resistance of the outer CrN layer and the inner Cr layer with high electron mobility. This finding proves the potential application of Cr/CrN multilayer coating in PEMFCs.

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

应用Cr/CrN多层涂层提高pemfc用316L双极板的耐蚀性和导电性

采用阴极电弧技术在316L不锈钢表面成功制备了Cr/CrN/Cr、CrN/Cr/CrN多层涂层和CrN单层涂层，并在模拟质子交换膜燃料电池（PEMFCs）环境下对其耐蚀性和电导率进行了系统研究。结果表明，CrN/Cr/CrN和CrN涂层比Cr/CrN/Cr涂层具有更好的耐蚀性和耐久性。这是由于CrN优越的化学惰性和高致密性，可以有效地阻挡电极的渗透。由于氧化铬的存在，所有涂层都表现为p型半导体，CrN/Cr/CrN涂层的受体密度（NA）最低，这是由于层间界面效应导致载流子输运受限。此外，通过PSP测试，CrN/Cr/CrN涂层具有最低的界面接触电阻（ICR），这是由于外层CrN层具有良好的耐腐蚀性，而内层Cr层具有较高的电子迁移率。这一发现证明了Cr/CrN多层涂层在PEMFCs中的潜在应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.