一种电解质、电解液及其应用

By introducing BF3 into the halide electrolyte to form the MnAXy·BF3 complex, the problems of low solubility and low-temperature precipitation of the halide electrolyte are solved, thereby improving the solubility of the electrolyte and the electrochemical performance of the battery.

CN116470145BActive Publication Date: 2026-07-17LANGU (HUZHOU) NEW ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LANGU (HUZHOU) NEW ENERGY TECH CO LTD
Filing Date
2023-05-05
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Halogenated electrolytes have low solubility in organic electrolytes and are prone to precipitation at low temperatures, making large-scale application difficult.

Method used

By introducing BF3 into the halide electrolyte to form the MnAXy·BF3 complex, the radius of the halide anion is increased, the binding energy of the anion and cation is reduced, and the solubility is improved.

Benefits of technology

It improves the solubility and low-temperature performance of the electrolyte in organic electrolytes, thereby enhancing the electrochemical performance of secondary batteries.

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Abstract

本发明提供了一种电解质、电解液及其应用。所述电解质的化学式为：MnAXy·BF3，其中，M为碱金属；A选自Si、Ge、Al、Ga、Zr、Sc、Ti、Y、In、Er或Lu中的任意一种；X为卤素；0＜n≤4；0＜y≤8。本发明通过在MnAXy卤化物电解质中引入BF3，卤化物MnAXy的卤素原子具有较强的电负性，可以与B原子通过电子云的作用，形成络合物MnAXy·BF3，增加MnAXy的阴离子半径，降低阴、阳离子的结合能，进一步促进阴、阳离子在溶液中的解离，提高溶解度。将其用于二次电池的电解液，有望提升电池的电化学性能。
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