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In Situ Polymerization of a Self-Healing Polyacrylamide-Based Eutectogel as an Electrolyte for Zinc-Ion Batteries

  • 0School of Materials Science and Engineering, State Key Laboratory of Silicon and Advanced Semiconductor Materials, Zhejiang University, Hangzhou 310027, China.
Acs Applied Materials & Interfaces +

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July 9, 2024

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July 9, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

A novel self-healing eutectogel electrolyte was developed for flexible zinc-ion batteries. This advanced gel overcomes dendrite growth and freezing issues, enabling stable, high-performance energy storage in demanding conditions.

Area Of Science

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background

  • Traditional hydrogel electrolytes for flexible batteries face challenges like zinc anode dendrite growth, side reactions, and freezing failure.
  • These limitations hinder the development and practical application of reliable zinc-ion batteries, especially for flexible devices.

Purpose Of The Study

  • To develop a self-healing and stretchable solid-state electrolyte for improved zinc-ion battery performance.
  • To address the limitations of conventional hydrogels in flexible zinc-ion batteries.

Main Methods

  • A deep eutectic solvent-acrylamide eutectic gel (DA-ETG) was synthesized by immobilizing a ZnCl2 deep eutectic solvent (DES) in a polyacrylamide matrix via in situ UV polymerization.
  • The DA-ETG was characterized for its mechanical properties, ionic conductivity, and electrochemical performance in a solid-state zinc-ion battery.

Main Results

  • The eutectogel electrolyte exhibited excellent mechanical strength (0.6 MPa fracture strength) and high ionic conductivity (6.4 × 10^-4 S cm^-1).
  • Zinc-ion batteries utilizing the DA-ETG demonstrated high capacity (580 mAh g^-1 at 0.1 A g^-1), exceptional rate capability (234 mAh g^-1 at 5 A g^-1), and remarkable cycling stability (85% capacity retention after 2000 cycles at 2 A g^-1).
  • The in situ polymerization enhanced electrode-electrolyte contact, reduced internal resistance, and improved long-term stability, while the self-healing property allowed for device reuse.

Conclusions

  • The developed self-healing and stretchable eutectogel electrolyte significantly enhances the performance and durability of solid-state zinc-ion batteries.
  • This material offers a promising solution for developing robust and reliable flexible energy storage devices capable of withstanding mechanical stress and extreme temperatures.

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