In-Situ Gradient Cross-Linking in Anion Exchange Membranes for Water Electrolyzers
Source abstract
Abstract
Anion exchange membrane water electrolyzers (AEMWEs) have emerged as a promising method for the efficient and cost-effective production of hydrogen, widely seen as the ideal energy source. However, the practical application of AEMWEs is hindered by the challenge of maintaining both high conductivity and dimensional stability in anion exchange membranes (AEMs), particularly after prolonged exposure to alkaline solution. Herein, we propose a gradient cross-linking strategy to improve the dimensional stability of AEMs while preserving high conductivity. The gradient self-cross-linked AEMs are developed by implementing a slow ring-opening cross-linking of epoxides in alkaline environments. This strategy can gradually compensate for the physical failure induced by water absorption expansion while maintaining high conductivity. The tensile stress of gradient cross-linked AEMs did not decrease but instead gradually increased even after a 30 day aging treatment. The extent of tensile stress improvement has been demonstrated to be effectively regulated by the alkaline concentration. The gradient cross-linking strategy shows potential in addressing the conductivity–dimensional stability trade-off often observed in AEMs.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Fuel Cells and Related Materials · Membrane-based Ion Separation Techniques · Advanced battery technologies research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Suzhou Key Laboratory of Soft Material and New Energy, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 200051, China
Funding
Collaborative Innovation Center of Suzhou Nano Science and Technology · National Key Research and Development Program of China · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions · Jiangsu Province Science Foundation for Carbon Emissions Peak and Carbon Neutrality Science and Technology Innovation · Suzhou Transformation of Scientific and Technological Achievements Carbon Peak and Carbon Neutral Project
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