A multi-level pore double-crosslinked single-ion gel polyelectrolyte, a preparation method and application thereof, and a water-based zinc metal battery

By preparing a hierarchical porous double cross-linked single-ion gel polyelectrolyte, the problems of concentration polarization and zinc dendrite growth in aqueous zinc metal batteries were solved, achieving improved battery performance with high conductivity, high mobility number, long cycle stability and high safety, which is suitable for large-scale energy storage and wearable electronic devices.

CN122127549APending Publication Date: 2026-06-02GUANGDONG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGDONG UNIV OF TECH
Filing Date
2026-05-06
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Traditional dual-ion gel electrolytes in existing aqueous zinc metal batteries suffer from problems such as concentration polarization, zinc dendrite growth, battery short circuits, and capacity decay, making it difficult to achieve a synergistic improvement in high conductivity, high Zn2+ transport number, high mechanical strength, high water retention, and long-cycle stability.

Method used

Using N-(hydroxymethyl)acrylamide and zinc 3-sulfopropyl acrylate as reactants, combined with polyethylene glycol diacrylate as a dual crosslinking agent and an initiator, a multi-level porous dual crosslinked monoionic gel polyelectrolyte is formed through photopolymerization. This constructs a multi-layered dynamic hydrogen bond and coordination synergistic network, achieving a synergistic unity of salt-free, single-ion conduction, high ion transport efficiency, strong water retention, and high mechanical strength.

Benefits of technology

It significantly improves the ionic conductivity, zinc ion transference number, water retention and mechanical properties of zinc metal batteries, extends the cycle life of batteries, solves the problems of zinc dendrite growth and battery short circuit, and is suitable for large-scale energy storage and wearable electronic device applications.

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Abstract

This invention relates to the field of electrochemical energy storage materials and aqueous zinc metal batteries, specifically to a hierarchical porous, double-crosslinked, single-ion gel polyelectrolyte, its preparation method and application, and aqueous zinc metal batteries. This hierarchical porous, double-crosslinked, single-ion gel polyelectrolyte is prepared by photopolymerization using N-(hydroxymethyl)acrylamide and zinc 3-sulfopropyl acrylate as reactants, water as a solvent, and adding a double-crosslinking agent, polyethylene glycol diacrylate, and an initiator. This gel polyelectrolyte exhibits a mesoporous-macroporous hierarchical interconnected double-crosslinked network structure, achieving salt-free operation, single-ion conductivity, high ion transport efficiency, strong water retention, strong zinc dendrite suppression, and high mechanical strength, thus solving key technical challenges such as zinc dendrite growth, battery short circuits, and capacity decay. Applied to aqueous zinc metal batteries, it possesses excellent cycle stability, cycle life, and high-temperature stability, effectively adapting to applications such as large-scale energy storage, flexible electronics, and special safety power supplies.
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Citation Information

Patent Citations

  • CN117855629A

  • CN118271521A

  • CN118978633A

  • CN119833780A