同济大学学报（自然科学版）2018，Vol.46Issue(5)：658-666,9.DOI:10.11908/j.issn.0253-374x.2018.05.013
低温工况下燃料电池性能衰减及策略优化
Performance Degradation and Strategy Optimization of PEMFCs Under Sub-freezing Temperature
摘要
Abstract
Polarization curve,electrochemical impedance spectroscopy (EIS),cyclic voltammetry (CV) and segmented cell techniques were adopted to investigate the performance degradation of proton exchange membrane fuel cell (PEMFC) during storage and start-up processes under sub-freezing tempemtures(＜0 ℃).The experimental results indicate that freeze/thaw cycles without gas purge during shutdown process will increase the polarization resistance and deteriorate the current density output of PEMFC.In addition,the electrochemical surface area (ECSA) of catalyst layer decreased and the uniformity of current density distribution of PEMFC worsened,which deteriorates the overall durability of PEMFC.Based on the optimized twice-purge strategy,the efficiency of residual water removing was enhanced with less gas consumption.With the aid of circulating coolant heating solution,the cold start of single cell from-30 ℃ was successfully achieved within 340 s.关键词
质子交换膜燃料电池(PEMFC)/冷启动/电流密度分布/性能衰减/策略优化Key words
proton exchange membrane fuel cell (PEMFC)/cold start/current density distribution/performance degradation/strategy optimization分类
信息技术与安全科学引用本文复制引用
林瑞,蒋正华,任应时,石文..低温工况下燃料电池性能衰减及策略优化[J].同济大学学报（自然科学版）,2018,46(5):658-666,9.基金项目
“十三五”国家重点研发计划(2016YFB 0101300) （2016YFB 0101300）
