Ti/(Ti,Cr)N/CrN multilayer coated 316L stainless steel by arc ion plating as bipolar plates for proton exchange membrane fuel cells

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• 作者：Shengli Wang^a ; ^c ; Ming Hou^a ; ^{houming@dicp.ac.cn} ; Qing Zhao^a ; ^c ; Yongyi Jiang^a ; ^c ; Zhen Wang^a ; ^c ; Huizhe Li^b ; Yu Fu^b ; Zhigang Shao^a ; ^{zhgshao@dicp.ac.cn}
• 关键词：Stainless steel bipolar plate ; Proton exchange membrane fuel cell ; Arc ion plating ; Multilayer coating
• 刊名：Journal of Energy Chemistry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：26
• 期：1
• 页码：168-174
• 全文大小：1968 K
• 卷排序：26

文摘

Arc ion plating (AIP) is applied to form Ti/(Ti,Cr)N/CrN multilayer coating on the surface of 316L stainless steel (SS316L) as bipolar plates for proton exchange membrane fuel cells (PEMFCs). The characterizations of the coating are analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Interfacial contact resistance (ICR) between the coated sample and carbon paper is 4.9 mΩ cm2 under 150 N/cm2, which is much lower than that of the SS316L substrate. Potentiodynamic and potentiostatic tests are performed in the simulated PEMFC working conditions to investigate the corrosion behaviors of the coated sample. Superior anticorrosion performance is observed for the coated sample, whose corrosion current density is 0.12 µA/cm2. Surface morphology results after corrosion tests indicate that the substrate is well protected by the multilayer coating. Performances of the single cell with the multilayer coated SS316L bipolar plate are improved significantly compared with that of the cell with the uncoated SS316L bipolar plate, presenting a great potential for PEMFC application.