Ionomeric binders in polymer electrolyte fuel cells: roles, challenges, and advances

IF 39 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Weisheng Yu, Fen Luo, Xian Liang, Chenxiao Jiang, Yan Xu, Zhiru Liu, Quan-Fu An, Michael D. Guiver, Liang Wu, Tongwen Xu
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引用次数: 0

Abstract

Polymer electrolyte fuel cells (PEFCs) represent a sustainable technology for converting chemical energy into electrical energy, playing a pivotal role in achieving carbon neutrality. At the core of PEFCs lie membrane electrode assemblies (MEAs), wherein ionomers perform dual functions as both ion exchange membranes (IEMs) and catalyst layer (CL) binders. This review focuses on ionomers used as CL binders, an underexplored yet critical component that significantly influences PEFC performance and durability. We systematically examine the roles of ionomers in enabling multiphase mass transport within CLs, including oxygen transport, water management, and ion conduction, alongside design principles for optimizing their molecular structures. Additionally, we investigate the interactions between ionomers and catalysts, and their implications for PEFC performance and longevity. The review also addresses the long-term stability of PEFCs, analyzing mechanisms of ionomer chemical degradation and physical aging, as well as potential mitigation strategies. By offering comprehensive analyses of ionomer functionalities, structure–property relationships, and their impact on PEFC performance, this review aims to inform future research and development efforts toward more efficient and durable ionomers. These insights are also applicable to other emerging MEA-based electrochemical devices, such as water and carbon dioxide electrolyzers.

Abstract Image

聚合物电解质燃料电池中的离子结合剂:作用、挑战和进展
聚合物电解质燃料电池(PEFCs)是一种将化学能转化为电能的可持续技术,在实现碳中和方面发挥着关键作用。pefc的核心是膜电极组件(MEAs),其中离子聚体具有离子交换膜(IEMs)和催化剂层(CL)粘合剂的双重功能。这篇综述的重点是用作CL粘合剂的离聚体,这是一种尚未开发但对PEFC性能和耐久性有重要影响的关键成分。我们系统地研究了离子单体在CLs内多相质量传输中的作用,包括氧传输、水管理和离子传导,以及优化其分子结构的设计原则。此外,我们还研究了离聚物和催化剂之间的相互作用,以及它们对PEFC性能和寿命的影响。该综述还讨论了pefc的长期稳定性,分析了离聚体化学降解和物理老化的机制,以及潜在的缓解策略。通过全面分析离聚体的功能、结构-性能关系及其对PEFC性能的影响,本文旨在为未来研究和开发更高效、更耐用的离聚体提供信息。这些见解也适用于其他新兴的基于mea的电化学设备,如水和二氧化碳电解槽。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Chemical Society Reviews
Chemical Society Reviews 化学-化学综合
CiteScore
80.80
自引率
1.10%
发文量
345
审稿时长
6.0 months
期刊介绍: Chemical Society Reviews is published by: Royal Society of Chemistry. Focus: Review articles on topics of current interest in chemistry; Predecessors: Quarterly Reviews, Chemical Society (1947–1971); Current title: Since 1971; Impact factor: 60.615 (2021); Themed issues: Occasional themed issues on new and emerging areas of research in the chemical sciences
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