循环压缩对PEM电解池性能的影响  

Effect of cyclic compression on PEM electrolysis cell performance

作　　者：张威[1,2] 罗马吉[1,2,3] 刘成 周威[1,2] ZHANG Wei;LUO Maji;LIU Cheng;ZHOU Wei(Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan,Hubei 430070,China;Hubei Key Laboratory of Fuel Cell,Wuhan University of Technology,Wuhan,Hubei 430070,China;Clean Energy Research Centre,Department of Chemical and Biological Engineering,University of British Columbia,Vancouver V6T 1Z3,Canada)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,湖北武汉430070 [2]武汉理工大学燃料电池湖北省重点实验室,湖北武汉430070 [3]不列颠哥伦比亚大学化学与生物工程系清洁能源研究中心,加拿大温哥华V6T 1Z3

出　　处：《江苏大学学报（自然科学版）》2022年第6期645-649,656,共6页Journal of Jiangsu University：Natural Science Edition

基　　金：国家留学基金资助项目(201806955078)。

摘　　要：针对质子交换膜电解池(proton exchange membrane electrolysis cell, PEMEC)组件在使用过程中可能会发生损坏,需要重复装配和拆卸电解池进行更换或维修操作等问题,研究了循环加载压力对PEM电解池性能的影响,对循环试验前后的多孔扩散层(porous transport layer, PTL)表面形貌进行了SEM(scanning electron microscope)电镜表征.结果表明:循环压缩后,PTL的结构发生不可逆的变化,从而影响电解池的性能;在高电流密度区间,电解池性能受循环压缩影响幅度呈现缓慢下降趋势;在较高夹紧压力下,循环压缩次数的增加对电解池性能影响逐渐减弱,适当提高装配压力可以减小重复装配对电解池性能的不利影响.To solve the problems of the components of proton exchange membrane electrolysis cell(PEMEC) with damage during the utilization process and the electrolyzer with repeated assembly and disassembly for replacement or repair operations, the effect of cyclic loading pressure on the performance of PEM electrolysis cells was investigated, and the surface morphology of the porous transport layer(PTL) before and after cyclic tests was characterized by SEM. The results show that after cyclic compression, the structure of PTL changes irreversibly, which affects the performance of electrolysis cell and reduces the service life of electrolysis cell device. The performance of electrolysis cell is affected by cyclic compression in the high current density interval with slow decreasing trend. At high clamping pressure, the effect of cyclic compression on the performance of electrolysis cell is gradually weakened by increasing the number of times of cyclic compression, and the adverse effect of repeated assembly on the electrolysis cell can be reduced by appropriate increasing of assembly pressure.

关 键 词：质子交换膜电解池 循环压缩 压力加载 多孔扩散层 SEM 

分 类 号：TK91[动力工程及工程热物理]