固定式发电燃料电池膜电极性能衰减分析  

Analysis of membrane electrode assembly performance degradation in fixed power generation fuel cell stack

作　　者：马勍 吕青青 蔡信 徐雨濛 沈妍[3] 贺丹丹 雷鹏飞 MA Qing;LV Qingqing;CAI Xin;XU Yumeng;SHEN Yan;HE Dandan;LEI Pengfei(Yuan Shen(Suzhou)Power Beijing Technology Co.,Ltd.,Suzhou,Jiangsu Province,215131,China;Jiangsu Huade Hydrogen Energy Technology Co.,Ltd.,Suzhou,Jiangsu Province,215625,China;School of Mechanical and Electrical Engineering,Jiangsu University of Science and Technology,Suzhou,Jiangsu Province,215600,China)

机构地区：[1]京能源深(苏州)能源科技有限公司,江苏苏州215131 [2]江苏铧德氢能源科技有限公司,江苏苏州215625 [3]江苏科技大学机电与动力工程学院,江苏苏州215600

出　　处：《电池工业》2025年第1期3-8,共6页Chinese Battery Industry

摘　　要：本文对天然气重整制氢型固定式发电用燃料电池堆进行时长为1.9万h的耐久测试,并对衰减前后的膜电极的电化学特性、微观结构变化、催化剂成分变化进行研究。结果表明:经过耐久性测试后的电堆膜电极电压衰减27.6%,电堆输出功率显著下降,耐CO性能降低。质子交换膜变薄,催化剂流失,催化剂中Pt和Ru含量(质量分数)显著下降,催化剂层出现开裂、坍塌现象。催化剂粒径由5~6 nm增长至8~10 nm,并且出现直径约为100 nm的催化剂团聚颗粒。催化剂流失和微观结构变化是燃料电池电化学性能衰减的重要原因。This article conducted a durability test of 19000 hours on a fixed fuel cell stack for hydrogen production from natural gas reforming,and studied the electrochemical characteristics,microstructure changes,and catalyst composition changes of the membrane electrode before and after attenuation.The research results show that after durability testing,the voltage degradation of the stack membrane electrode is 27.6%,the output power of the stack is significantly reduced,and the anti CO ability is reduced.The proton exchange membrane becomes thinner,and the surface catalyst is lost.The content of Pt and Ru in the catalyst significantly decreases,and the catalyst layer cracks and collapses.The particle size of the catalyst increased from 5~6 nm to 8~10 nm,and catalyst agglomerates with a diameter of approximately 100 nm appeared.Catalyst loss and microstructure changes are important reasons for the electrochemical performance degradation of fuel cells.

关 键 词：固定式发电 燃料电池 膜电极 微观结构 催化剂 

分 类 号：TM911[电气工程—电力电子与电力传动]