Modification strategies for non-aqueous,highly proton-conductive benzimidazole-based high-temperature proton exchange membranes

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外文摘要：High-temperature proton exchange membranes(HT-PEMs)possess excellent thermal and outstanding electrochemical stability,providing an avenue to realize high-temperature proton exchange membranes fuel cells(HT-PEMFCs)with both superior power density and long-term durability.Unfortunately,poly-benzimidazole(PBI),a typical material for conventional HT-PEMs,fails to compromise the high non-aqueous proton conductivity and high mechanical properties,thus hindering their practical applications.Achieving efficient nonaqueous proton conduction is crucial for HT-PEMFC,and many insightful research works have been done in this area.However,there still lacks a report that integrates the host-guest in-teractions of phosphoric acid doping and the structural stability of polymers to systematically illustrate modification strategies.Here,we summarize recent advancements in enhancing the nonaqueous proton conduction of HT-PEMs.Various polymer structure modification strategies,including main chain and side group modification,cross-linking,blocking,and branching,are reviewed.Composite approaches of poly-mer,including compounding with organic porous polymers,filling the inorganic components and mod-ifying with ionic liquids,etc.,are also covered in this work.These strategies endow the HT-PEMs with more free volume,nanophase-separated structure,and multi-stage proton transfer channels,which can facilitate the proton transportation and improve their performance.Finally,current challenges and future directions for further enhancements are also outlined.

外文关键词：

BenzimidazoleNonaqueous proton conductionFree volumeNanophase-separated structureStructure modification

作者：

Yunfa Dong、Shijie Zhong、Yuhui He、Zhezhi Liu、Shengyu Zhou、Qun Li、Yashuai Pang、Haodong Xie、Yuanpeng Ji、Yuanpeng Liu、Jiecai Han、Weidong He

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作者单位：

National Key Laboratory of Science and Technology on Advanced Composites in Special Environments,and Center for Composite Materials and Structures,Harbin Institute of Technology,Harbin 150080,China

School of Petroleum Engineering,Chongqing University of Science and Technology,Chongqing 401331,China

School of Physics,University of Electronic Science and Technology of China,Chengdu 610054,China

MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage,School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,China

Chongqing Research Institute,Harbin Institute of Technology,Chongqing 401151,China

School of Mechanical Engineering,Chengdu University,Chengdu 610106,China

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基金：

Science Foundation of Na-tional Key Laboratory of Science and Technology on Advanced Composites in Special Environments国家自然科学基金重庆市自然科学基金重庆市自然科学基金重庆市自然科学基金重庆市自然科学基金重庆市自然科学基金Chongqing Technology Innovation and Application Development Special Key Project

项目编号：

12002109CSTC2021jcyj-msxmX10305CSTB2022NSCQ-MSX0246CSTB2022NSCQ-MSX0242CSTB2022NSCQ-MSX1244CSTB2022NSCQ-CSTB2023TIAD-KPX0010

出版年：

2024

DOI：

10.1016/j.cclet.2023.109261

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(4)

参考文献量103