Electrolyte for aqueous manganese-based battery, preparation method of electrolyte, battery and application

By using an electrolyte with a weak acid dissociation balance design in an aqueous manganese-based battery, protons can be supplied on demand, solving the problem of incomplete MnO2 dissolution, improving battery reversibility and lifespan, and reducing the generation of "dead manganese".

CN120955232APending Publication Date: 2025-11-14TIANJIN UNIV +1
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Patent Information

Application Number
CN202511129752.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-13
Publication Date
2025-11-14

AI Technical Summary

Technical Problem

In aqueous manganese-based batteries, the electrochemical reaction of manganese dioxide exhibits poor reversibility and cycle stability, mainly due to the incomplete dissolution of MnO2 caused by proton mismatch, resulting in the formation of "dead manganese" species, which affects battery performance.

Method used

The electrolyte, designed with weak acid dissociation equilibrium, achieves on-demand proton supply through the synergistic regulation of Le Chatelier's principle and molecular polarization effect, ensuring that the proton release at the electrode/electrolyte interface matches the electrochemical reaction rate and avoiding the formation of "dead manganese".

Benefits of technology

It significantly improves the electrochemical dissolution efficiency of manganese dioxide, enhances the cycle life and active manganese utilization of the battery, and extends the battery life.

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Abstract

The invention discloses an electrolyte for an aqueous manganese-based battery. The electrolyte comprises an electrolyte, and the electrolyte comprises a manganese salt; the weak acid is used for regulating and controlling proton dynamic release of the positive electrode / electrolyte interface to realize on-demand supply of protons of the positive electrode / electrolyte interface; and a solvent, wherein the solvent is deionized water; the PH range of the electrolyte is 2.0-3.5, and the electrolyte can realize on-demand supply of protons of a positive electrode / electrolyte interface in the charging and discharging process of the aqueous manganese-based battery, and promotes efficient and reversible deposition and dissolution reaction of a positive active substance manganese dioxide. According to the invention, the proton on-demand supply electrolyte is constructed by utilizing dynamic dissociation equilibrium of weak acid, so that on-demand supply of protons in the MnO2 dissolving process is realized, complete electrochemical dissolution of MnO2 is promoted, and generation of'dead manganese 'is inhibited, so that the cycling stability of the battery and the utilization efficiency of active substances are remarkably improved. The invention also discloses an aqueous manganese-based battery for realizing on-demand supply of protons and application of the aqueous manganese-based battery in the field of secondary energy storage.
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