A positive electrode material, a preparation method and application thereof

By combining dielectric barrier discharge plasma ball milling technology with eutectic lithium salt, the structural stability and interfacial side reaction problems of lithium-rich manganese-based cathode materials were solved, and highly dispersed single crystal morphology was prepared, improving the electrochemical performance and cycle life of the battery.

CN122117887APending Publication Date: 2026-05-29HEFEI GUOXUAN HIGH TECH POWER ENERGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI GUOXUAN HIGH TECH POWER ENERGY
Filing Date
2026-01-29
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing lithium-rich manganese-based cathode materials suffer from bottlenecks in structural stability and interfacial side reactions, leading to electrochemical performance degradation and reduced lifetime. Traditional preparation methods are complex and costly, making it difficult to achieve highly dispersed single-crystal morphology and low interfacial side reactions.

Method used

By employing dielectric barrier discharge plasma ball milling technology combined with eutectic lithium salt, and through an instantaneous melting-thermal explosion quenching mechanism, efficient mixing and sintering of nickel cobalt manganese oxide precursors and eutectic lithium salt are achieved, resulting in the preparation of lithium-rich manganese-based cathode materials with single-crystal morphology. This avoids impurity contamination and simplifies the process.

Benefits of technology

The prepared single-crystal lithium-rich manganese-based cathode material exhibits excellent structural stability and electrochemical performance, improves cycle performance and specific capacity, reduces interfacial side reactions, and simplifies the preparation process.

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Abstract

The application provides a positive electrode material and a preparation method and application thereof, and relates to the technical field of lithium ion batteries.A preparation method of a positive electrode material comprises the following steps: S1, a nickel source, a manganese source, a cobalt source and a sodium hydroxide solution are subjected to a heating reaction, and then washing and drying are performed to obtain a nickel-cobalt-manganese hydroxide precursor; S2, the nickel-cobalt-manganese hydroxide precursor is subjected to heat treatment to obtain a nickel-cobalt-manganese oxide precursor; and S3, the nickel-cobalt-manganese oxide precursor and a eutectic lithium salt are mixed and subjected to plasma-ball milling treatment, and then sintering is performed to obtain the positive electrode material.The positive electrode material prepared by the application is a lithium-rich manganese-based positive electrode material with a single crystal morphology, which is helpful to improve the specific capacity and cycle performance of a lithium ion battery.
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