聚1,5-二氨基蒽醌改性PEMFC用GDB的耐久性  

Durability of GDB for PEMFC modified by poly(1,5-diaminoanthraquinone)

作　　者：卢鑫 李赏[1,2] 朱振 LU Xin;LI Shang;ZHU Zhen(State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan,Hubei 430070,China;Foshan Xianhu Laboratory,National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies,Foshan,Guangdong 528200,China;Hubei Key Laboratory of Fuel Cells,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,湖北武汉430070 [2]国家氢氨能源技术重点实验室,佛山市仙湖实验室,广东佛山528200 [3]武汉理工大学湖北省燃料电池重点实验室,湖北武汉430070

出　　处：《电池》2024年第6期761-765,共5页Battery Bimonthly

基　　金：国家自然科学基金(22075218)。

摘　　要：气体扩散层支撑层(GDB)中疏水材料的流失会加速质子交换膜燃料电池(PEMFC)耐久性的下降。采用高恒电位的方法加速测试电化学沉积聚1,5-二氨基蒽醌(P15DAAQ)疏水处理PEMFC用GDB的耐久性,并用四电子探针法、循环伏安法等进行分析。与由聚四氟乙烯(PTFE)浸渍制备的PTFE-GDB进行对比,发现P15DAAQ-GDB在高电压、酸性环境下的稳定性更差。P15DAAQ的流失,导致P15DAAQ-GDB气体扩散层的水管理能力下降,造成膜电极组件(MEA)性能下降。经过1.45 V高电位96 h的耐久性测试后,P15DAAQ-GDB组装MEA的峰值功率仍有1.789 W/cm^(2)(初始性能的90.17%)。The loss of hydrophobic materials in the gas diffusion backing(GDB) will accelerate the decline of the durability of the proton exchange membrane fuel cell(PEMFC).The durability of GDB for PEMFC modified by electrochemical deposition with poly(1,5-diaminoanthraquinone)(P15DAAQ) is studied by accelerated stress test with high constant-potential,and analyzed by the four-electron probe method and cyclic voltammetry method.Compared with PTFE-GDB prepared by impregnation method with polytetrafluoroethylene(PTFE),the stability of P15DAAQ-GDB under high voltage and acidic conditions is even worse.The loss of P15DAAQ leads to the decrease of the water management ability of the P15DAAQ-GDB gas diffusion layer,which causes a performance decline of membrane electrode assembly(MEA).After a durability test under a high potential of 1.45 V for 96 h,the peak power of the MEA assembled with P15DAAQ-GDB still reaches 1.789 W/cm^(2)(90.17% of the initial performance).

关 键 词：质子交换膜燃料电池(PEMFC) 气体扩散层支撑层(GDB) 聚1 5-二氨基蒽醌(P15DAAQ) 耐久性 

分 类 号：TM911.42[电气工程—电力电子与电力传动]