Battery cell, preparation method of positive electrode sheet, battery, and electric device

CN122118219APending Publication Date: 2026-05-29CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Filing Date
2024-11-27
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing battery cells using oil-based formulations have the problem of difficult processing of cathode slurry, especially because the cathode active material absorbs water during storage, causing gelation and clumping, which affects processing performance. Furthermore, the active reaction of sodium in aqueous formulations leads to a reduction in battery capacity.

Method used

A water-based formulation is formed by combining positive electrode active material with water-soluble binder and sodium replenisher to compensate for sodium loss, improve battery capacity, and solve the problem of difficult processing of gel agglomerates.

Benefits of technology

This has resulted in an increase in the capacity of individual battery cells, improved the uniformity and processing performance of the cathode slurry, prevented gel agglomeration, and enhanced the convenience of battery storage and processing.

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Abstract

The application relates to a battery monomer, a preparation method of a positive electrode sheet, a battery and a power utilization device. The battery monomer comprises a positive electrode sheet, and the positive electrode sheet comprises a positive electrode film layer; the positive electrode film layer comprises a positive electrode active material, a water-soluble binder and a sodium supplementing agent. The water system formula is formed by compounding the positive electrode active material, the water-soluble binder and the sodium supplementing agent, the water system formula is not afraid of water, so that even if the material absorbs water and is deliquescent, the water system formula will not cause the problem of caking. Therefore, the difficult processing problem existing in the current oil system formula can be effectively solved. By compounding the positive electrode active material and the sodium supplementing agent, the loss of lost sodium is compensated, so that the target of supplementing sodium and increasing capacity is achieved, and the capacity of the whole battery monomer can be effectively improved; therefore, the problem of easy gel caking and difficult processing of the traditional oil system formula battery monomer can be solved, and the capacity of the battery monomer is improved.
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