Battery monomer and preparation method thereof, battery device and power utilization device

By using a coating layer with a coverage rate of ≥60% and a fibrillated binder in the active material layer of the battery cell, the problem of high porosity in the active material layer of traditional battery cells is solved, and high cycle performance and high energy density of the battery cell are achieved.

CN121601664APending Publication Date: 2026-03-03CONTEMPORARY AMPEREX TECHNOLOGY CO LTD +1
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Patent Information

Application Number
CN202610108677.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-27
Publication Date
2026-03-03

AI Technical Summary

Technical Problem

The high porosity of the active material layer in traditional battery cells limits their overall performance in practical applications.

Method used

An active material layer is prepared by using a coating layer with a coating rate of ≥60% and a fibrillated first binder. The coating layer contains a second binder and a first conductive agent. The active material layer is prepared by dry or wet mixing to improve the bonding strength and conductivity between particles.

Benefits of technology

It improves the cycle performance and rate performance of battery cells, enhances the stability of the active material layer, and increases the energy density of battery cells.

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Abstract

The invention provides a battery monomer and a preparation method thereof, a battery device and a power utilization device, the battery monomer comprises a positive electrode, a negative electrode and an electrolyte, at least one of the positive electrode and the negative electrode comprises a current collector and an active material layer arranged on at least one side of the current collector, and the active material layer comprises active material particles, comprising a core and a coating layer located on the surface of the core, and the core comprises a positive active material or a negative active material; the coating layer comprises a second binder and a first conductive agent; the coating rate of the coating layer to the inner core is not less than 60%; and a fibrillated first binder, wherein at least part of the first binder and the coating layer are mutually connected or wound. The battery monomer provided by the embodiment of the invention has good cycle performance and good rate capability.
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Citation Information

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