不同Mo含量的TiMoN涂层在模拟质子交换膜燃料电池阴极环境下的耐腐蚀性和导电性研究

Study on Corrosion Resistance and Conductivity of TiMoN Coatings with Different Mo Contents under Simulated PEMFC Cathode Environment.

作者信息

Jin Jie, Cao Rui, Zhang Jinzhou, Tao Yi, Tian Xu, Kou Xianli

机构信息

College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310000, China.

出版信息

Materials (Basel). 2022 May 25;15(11):3766. doi: 10.3390/ma15113766.

DOI:10.3390/ma15113766

PMID:35683065

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9181102/

Abstract

TiMoN coatings with different Mo contents on a SS316L substrate are deposited by using closed field unbalanced magnetron sputtering ion plating (CFUMSIP) technology to enhance the corrosion resistance and durability of stainless steel (SS) bipolar plates (BPs) in proton exchange membrane fuel cell (PEMFC) during the start-up/shut-down process. The electrochemical test results illustrate that TiMoN-4A coating has extremely good corrosion resistance compared to other coatings. The potentiostat polarization (+0.6 V) tests indicate that the corrosion current density (I) of TiMoN-4A coating is 5.22 × 10A cm, which meets the department of energy 2020 targets (DOE, ≤1 × 10 A cm). Otherwise, TiMoN-4A coating also exhibits the best corrosion resistance and stability in potentiostatic polarization, electrochemical impedance spectroscopy (EIS), and high potential (+1.2V) polarization tests. The interfacial contact resistance (ICR) measurement results show that TiMoN-4A coating has the minimum ICR of 9.19 mΩ·cm, which meets the DOE 2020 targets (≤10 mΩ·cm).

摘要

采用闭合场非平衡磁控溅射离子镀（CFUMSIP）技术，在SS316L基底上沉积了不同钼含量的TiMoN涂层，以提高质子交换膜燃料电池（PEMFC）中不锈钢（SS）双极板（BP）在启动/关闭过程中的耐腐蚀性和耐久性。电化学测试结果表明，与其他涂层相比，TiMoN-4A涂层具有极佳的耐腐蚀性。恒电位极化（+0.6 V）测试表明，TiMoN-4A涂层的腐蚀电流密度（I）为5.22×10A/cm，符合美国能源部2020年目标（DOE，≤1×10A/cm）。此外，在恒电位极化、电化学阻抗谱（EIS）和高电位（+1.2V）极化测试中，TiMoN-4A涂层也表现出最佳的耐腐蚀性和稳定性。界面接触电阻（ICR）测量结果表明，TiMoN-4A涂层的最小ICR为9.19mΩ·cm，符合美国能源部2020年目标（≤10mΩ·cm）。