Aqueous zinc-ion batteries (ZIBs) represent a promising solution for “beyond-lithium-ion” chemistries, but certain problems hinder their further development, especially when conventional aqueous electrolytes are involved. Hydrogel polymer electrolytes (HPEs) offer opportunities to circumvent these issues. This review aims to provide a fundamental understanding of how to design better HPEs for high-performing ZIBs, through critically analyzing the recent literature. Concerns regarding HPEs’ mechanical, interfacial, and electrochemical characteristics are addressed, followed by in-depth insights into their underlying mechanisms. Possibilities for practical applications of HPEs are also discussed.
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Li et al. (2024) studied this question.
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