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PBI基/PIM-1复合离聚物提高碱性膜氢燃料电池性能

作者：王蕾蕾，吴雪梅，陈婉婷，逄博，崔福军，贺高红

单位： 1. 大连理工大学精细化工国家重点实验室，膜科学与技术研究开发中心，大连 116024； 2. 大连理工大学盘锦产业技术研究院，盘锦 124221

关键词：离聚物；聚苯并咪唑；自聚微孔聚合物（PIMs）; 催化层三相界面；燃料电池

DOI号： 10.16159/j.cnki.issn1007-8924.2025.05.013

分类号： TQ028; TM911.42

出版年,卷(期):页码： 2025,45(5):133-142

摘要：

本研究提出一种用于碱性阴离子交换膜燃料电池（AEMFC）催化层的新型复合离聚物设计。该设计将高离子传导性的亲水聚合物（UTA-PBI-25%）与具有微孔结构的疏水聚合物（PIM-1）相结合。亲水组分提供优异的离子传导性和催化剂结合能力，而疏水微孔组分则有效抑制溶胀并显著增强催化层的透气性。优化配比后的复合离聚物实现了催化层结构的协同改善，使其在催化剂分散、电化学性能和电极反应效率方面表现优异。应用于氢氧燃料电池时，该复合离聚物显著提升了电池在高电流密度下的输出性能，获得了高水平的峰值功率密度。这种“亲水黏结剂-疏水造孔剂”复合策略有效兼顾了催化层对离子传导性和气体传质能力的需求，为优化AEMFC性能提供了新思路.

This study proposed a novel composite ionomer design for the catalyst layer of alkaline anion exchange membrane fuel cells (AEMFC). The design combined a highly ion-conductive hydrophilic polymer (UTA-PBI-25%) with a hydrophobic microporous polymer (PIM-1). The hydrophilic component provided excellent ion conductivity and catalyst binding capability, while the hydrophobic microporous component effectively suppressed swelling and significantly enhanced gas permeability within the catalyst layer. The composite ionomer at an optimized ratio achieved synergistic improvements in the catalyst layer structure, resulting in outstanding performance in catalyst dispersion, electrochemical performance and electrode reaction efficiency. When applied to hydrogen-oxygen fuel cells, this composite ionomer substantially enhanced the cell’s output performance at high current densities, achieving a high peak power density. This “hydrophilic binder-hydrophobic pore-forming agent” composite strategy effectively balanced the catalyst layer’s requirements for both ion conductivity and gas transport capabilities, offering a new approach to optimize AEMFC performance.

基金项目：

国家自然科学基金项目（22378042， 22021005）

作者简介：

王蕾蕾（2000-）, 女, 硕士研究生, 研究方向为燃料电池

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