测试方法对PEMFC膜电极耐久性的影响  

Effects of test methods on durability of MEA for proton exchange membrane fuel cell

作　　者：王志昌 李赏[1] 刘畅[1] 郭伟[1] 潘牧[1] WANG Zhi-chang;LI Shang;LIU Chang;GUO Wei;PAN Mu(Key Laboratory of Hubei Province for Fuel Cell,State Key Laboratory of Advancecl Technology for Materials Synthesis and Processing,Wuhan University of Technology,wuhan Hubei 430070,China)

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室燃料电池湖北省重点实验室,湖北武汉430070

出　　处：《电源技术》2018年第11期1685-1689,共5页Chinese Journal of Power Sources

基　　金：国家重点研发计划(2016YFB0101300;2016YFB-0101313);湖北省技术创新专项(2016AAA047);中央高校基本科研业务费专项资金(2017Ⅲ023)

摘　　要：质子交换膜燃料电池(PEMFC)的耐久性差阻碍了其商业化应用,耐久性的快速评价成为了研究热点。比较了变载循环法和循环伏安法两种测试方法对PEMFC膜电极耐久性的影响。研究了变载循环法测试过程中的变载速度和加湿度对膜电极寿命的影响。结果表明,加湿度70%/70%、变载速度66.67 m A/(cm2·s)时,320个变载循环后,800 m A/cm2时,电压下降6.17%。循环伏安法能引起电池性能更大幅度的衰减,相同测试时间后,800 m A/cm2时,电压下降23.30%。循环伏安法中1.0 V以上的高电压引起的碳腐蚀是电池性能加速衰减的主要原因。在相同的加湿条件下,电池电压的衰减随着变载速度的增大而增大。在相同的变载速度下,加湿度低至25%/25%时,电池的衰减增大。The durability of proton exchange membrane fuel cells （PEMFC） is a major barrier for commercializing thispromising technology, and the rapid evaluation of durability has become a research hotspot. In this paper, the effectsof two kinds of test methods, namely load changing cycle and cyclic voltammetry, on the durability of MEA forPEMFC were compared. The effects of load changing rate and humidity on the lifetime of MEA were studied duringthe process of load changing cycle. The results show that when the humidity is 70%/70% and the load change rate is66.67 mA/（cm2-s）, the voltage @ 800 mA/cm2 drops 6.17% after 320 load cycles. Cyclic voltammetry can result in agreater degradation of the performance of PEMFC. In the same test time, the cell voltage @ 800 mA/cm2 drops23.30%. The carbon corrosion caused by the high voltage above 1.0 V during CV is the main reason for the decay ofperformance. Under the same humidification condition, the degradation rate of the cell voltage increases with theincreasing of the load changing rate. At the same load changing rate, the degradation of PEMFC increases when thehumidification is as low as 25%/25%.

关 键 词：质子交换膜燃料电池(PEMFC) 耐久性 变载循环 循环伏安 碳腐蚀 

分 类 号：TM911.4[电气工程—电力电子与电力传动]