Pt涂层对TA4双极板在质子交换膜制氢电解池阳极环境中的电化学行为与界面导电性能研究  

Effect of Pt Coating on Electrochemical Behavior and Interfacial Conductivity of TA4 Bipolar Plate in Anode Side Environment of Proton Exchange Membrane Water Electrolyzer for Hydrogen Production

作　　者：徐桂芝 杜小泽[1] 胡晓 宋洁 XU Guizhi;DU Xiaoze;HU Xiao;SONG Jie(School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China;State Key Laboratory of Advanced Power Transmission Technology,State Grid Smart Grid Research Institute Co.,Ltd.,Beijing 102209,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]先进输电技术国家重点实验室(国网智能电网研究院有限公司),北京102209

出　　处：《中国腐蚀与防护学报》2024年第5期1370-1376,共7页Journal of Chinese Society For Corrosion and Protection

基　　金：国家重点研发计划(2021YFB4000100);国家电网有限公司科技资助项目(521532220014)。

摘　　要：采用直流脉冲磁控溅射技术在TA4钛双极板表面成功制备了Pt涂层,涂层的存在显著提高了TA4在质子交换膜制氢电解池阳极环境中的界面导电性能。随着沉积时间的延长,Pt涂层的厚度从约0.29μm增长到约0.95μm,晶格常数从5 min的0.39112 nm增加到15 min的0.39128 nm;电化学研究表明Pt涂层样品的开路电位比TA4高约0.77 V。延长沉积时间可进一步增大界面电化学反应阻力,体现在电荷转移电阻随制备时间的延长而逐渐增加,分别为5.52×10^(4),5.91×10^(4)和6.10×10^(4)Ω·cm^(2)。最重要的是,Pt涂层可以有效提高并维持界面优异的导电性能,模拟稳态极化测试后的界面接触电阻仅发生略微增长。Pt coatings were successfully deposited on the surface of TA4 Ti-alloy using the DC pulse magnetron sputtering technique.With the increasing deposition time,the lattice constants of Pt coating increased from 0.39112 nm at 5 min to 0.39128 nm at 15 min,correspondingly the thickness increased from approximately 0.29μm to around 0.95μm.Electrochemical studies revealed that the open circuit voltage(OCP)of Pt-coated TC4 was approximately 0.77 V higher than that of the plain TA4.With the extension of deposition time,the interfacial electrochemical reaction resistance further increases,as a result,its charge transfer resistance will gradually increase with deposition time as described as below:5.52×10^(4),5.91×10^(4),and 6.1×10^(4)Ω·cm^(2),respectively.Importantly,the Pt coating effectively enhanced and maintained the excellent interface conductivity,as the interface contact resistance(ICR)only exhibited a slight increase after a simulated steady-state polarization testing.In sum,the Pt coating can significantly enhance the interfacial conductivity of TA4 in the anode side environment of proton exchange membrane hydrogen electrolyzer(PEMWE).

关 键 词：质子交换膜制氢电解池 双极板 Pt涂层 电化学阻抗 界面接触电阻 

分 类 号：O646[理学—物理化学]