中国电机工程学报2025，Vol.45Issue(7)：2699-2709,中插21,12.DOI:10.13334/j.0258-8013.pcsee.232062
机车动态工况下质子交换膜燃料电池多孔电极衰退机理分析
Degradation Mechanism Analysis of Porous Electrode in Proton Exchange Membrane Fuel Cell Under Dynamic Conditions of Locomotive
摘要
Abstract
To investigate the degradation behavior of proton exchange membrane fuel cells(PEMFCs)under dynamic conditions of locomotives,we have conducted a 900-hour durability test on a 300 W stack.A novel approach combining the distribution of relaxation time and the transmission line model is proposed to evaluate the degradation mechanism.The single cell with significant voltage drop is selected for the study according to the inconsistency analysis of the stack.Based on the polarization curve and impedance spectroscopy analysis,the distribution of relaxation time is used to investigate the trend of polarization processes in each frequency band,and the transmission line model is established for parameter identification and quantification.Finally,scanning electron microscope(SEM)is used to characterize the microscopic morphology of different cells.The experimental results show that during 0～500 h period,the catalyst performance remains essentially stable,while carbon corrosion increases electrode porosity and alleviates the mass transport loss;during 500～900 h period,the performance of catalyst accelerates decay.Carbon corrosion accumulates and causes severe damage to the electrode structure.The loss of numerous micropores and subsequent structural compaction and collapse rapidly deteriorate the mass transport performance,ultimately resulting in the failure of PEMFC.The results show that the proposed method can effectively evaluate the degradation mechanism of porous electrode in fuel cells.关键词
质子交换膜燃料电池/耐久性/电化学阻抗谱/催化剂衰退/碳腐蚀Key words
proton exchange membrane fuel cell(PEMFC)/durability/electrochemical impedance spectroscopy/catalyst degradation/carbon corrosion分类
信息技术与安全科学引用本文复制引用
唐双喜,张雪霞,黄磊,邱丹洛..机车动态工况下质子交换膜燃料电池多孔电极衰退机理分析[J].中国电机工程学报,2025,45(7):2699-2709,中插21,12.基金项目
国家自然科学基金项目(51607149) （51607149）
四川省重点研发计划项目(2022YFG0257).Project Supported by National Natural Science Foundation of China(51607149) （2022YFG0257）
Key R&D Program of Sichuan Province(2022YFG0257). （2022YFG0257）
