Negative electrode material and preparation method thereof, negative electrode plate and battery

By combining the single layer MXene with resin prepolymer and perylene-2,5,8,11-tetracarboxylic acid, an anode material was prepared, which solved the problem of sodium storage capacity of hard carbon anode material and low efficiency for the first time, and achieved efficient and stable sodium ion battery performance.

CN119725479AActive Publication Date: 2025-03-28JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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Patent Information

Application Number
CN202411943216.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-26
Publication Date
2025-03-28
Estimated Expiration
2044-12-26

AI Technical Summary

Technical Problem

The hard carbon negative electrode material used in existing sodium ion batteries has low sodium storage capacity and is low for the first time Coulomb efficiency, making it difficult to meet the needs of improved battery performance.

Method used

A single-layer MXene suspension and resin prepolymer dispersion were mixed, perylene-2,5,8,11-tetracarboxylic acid was added, and the negative electrode material was prepared by hydrothermal reaction and carbonization treatment. This method realizes the chemical connection between MXene and resin prepolymer through the condensation reaction of PTCA, improving the self-stacking and structural stability of MXene sheets.

Benefits of technology

It effectively improves the first-time Coulomb efficiency, capacity performance and cycling performance of the negative electrode material, provides more sodium storage sites and improves structural stability.

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Abstract

The embodiment of the invention relates to a negative electrode material and a preparation method thereof, a negative electrode plate and a battery, and the preparation method of the negative electrode material comprises the following steps: S1, uniformly mixing a single-layer MXene suspension and a resin prepolymer dispersion liquid, adding perylene-2, 5, 8, 11-tetracarboxylic acid, and uniformly stirring to obtain a precursor solution; s2, performing hydrothermal reaction on the precursor solution to obtain a carbon precursor; and S3, performing carbonization treatment on the carbon precursor in a protective gas atmosphere to obtain the negative electrode material. Therefore, the first efficiency, the capacity performance and the cycle performance of the negative electrode material can be effectively improved.
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