Multi-component composite electrolyte, preparation method and application thereof in zinc ion battery

By introducing acetamide and asparagine into an aqueous zinc-ion battery to form a multi-component composite electrolyte, the thermodynamic and kinetic problems of aqueous zinc-ion batteries under extreme temperatures were solved, achieving high performance and stability of the battery.

CN119650888BActive Publication Date: 2026-05-29ZHENGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHENGZHOU UNIV
Filing Date
2024-11-21
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Aqueous zinc-ion batteries face challenges under extreme temperature conditions, including thermodynamic hydrogen evolution reaction, corrosion and passivation, as well as kinetic dendrite growth and dead zinc formation, which affect their rapid redox kinetics and charge-discharge reversibility.

Method used

Acetamide and asparagine were introduced as additives for multi-component composite electrolytes. By improving the solvation structure and hydrogen bond network, an organic-inorganic solid electrolyte interphase (SEI) was formed, which accelerated Zn deposition kinetics and enhanced the wide temperature range adaptability of the electrolyte.

Benefits of technology

It improves the electrochemical performance of the battery, enhances the stability of the electrode/electrolyte interface, suppresses side reactions, and achieves long cycle life and fast charge/discharge capability over a wide temperature range.

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Abstract

The application provides a multi-component composite electrolyte, a preparation method and application thereof in a zinc ion battery. The preparation method of the multi-component composite electrolyte comprises the following steps: adding acetamide and asparagine into a ZnSO4 solution, stirring and uniformly mixing, and standing to obtain the multi-component composite electrolyte. The application realizes the water-based zinc ion battery with long normal / low-temperature cycle life, stable electrode / electrolyte interface and strong corrosion resistance by the method of compensating the negative influence of kinetics caused by the organic solvent, introducing acetamide into the ZnSO4 electrolyte to improve the wide-temperature-range adaptability of the battery, and introducing asparagine to compensate the reversibility of Zn deposition kinetics.
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