Aqueous zinc ion battery electrolyte and preparation method and application thereof

By adding O-phosphate ethanolamine to the electrolyte of the aqueous zinc ion battery, an interface protective layer is generated, which solves the problem of side reactions in the negative electrode of the battery, and significantly improves the stability and cycle life of the battery.

CN119650891APending Publication Date: 2025-03-18NORTH CHINA ELECTRIC POWER UNIV
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Patent Information

Application Number
CN202411889865.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-20
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

In practical applications, aqueous zinc ion batteries face side reactions of the negative electrode electrolyte interface, such as hydrogen evolution, corrosion and passivation, which leads to deterioration of battery performance and shortening of cycle life.

Method used

The electrolyte solution was added to the electrolyte, and through the chemical bond formation and electrochemical decomposition reaction with the zinc metal surface, an organic and inorganic hybrid interface protective layer was formed in situ, preventing water molecules from contacting the zinc negative electrode, and inhibiting side reactions and the growth of zinc dendrites.

Benefits of technology

It significantly improves the negative interface stability and cycle life of the aqueous zinc ion battery, and improves the overall performance and safety of the battery.

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Abstract

The invention provides an aqueous zinc ion battery electrolyte as well as a preparation method and application thereof, and relates to the technical field of electrolytes. The aqueous zinc ion battery electrolyte comprises zinc salt, O-phosphoethanolamine and water. O-phosphoethanolamine is added into the electrolyte, and O-phosphoethanolamine molecules not only can be preferentially adsorbed to the surface of a zinc negative electrode, but also can be subjected to an electrochemical decomposition reaction to form an organic-inorganic hybrid interface protection layer, so that direct contact between water molecules and the zinc negative electrode is prevented, and generation of negative electrode interface side reaction and growth of zinc dendrites are inhibited; the stability of a negative electrode interface is enhanced.
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