Electrode plate, battery and electric device

CN119731796APending Publication Date: 2025-03-28CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202380061490.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-04-07
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

It is difficult for traditional electrode plates to achieve high ionic conductivity and electronic conductivity at the same time, resulting in high DC internal resistance of the battery, which limits the improvement of battery performance.

Method used

It adopts a structure of current collector, undercoat and active layer, in which the undercoat contains a conductive agent, and the active layer contains an active material and a first liquid-absorbing material with high liquid absorption rate. Through stacking and dispersing density gradient, the performance of the electrode pole piece is improved. Ionic and electronic conductivity.

Benefits of technology

The DC internal resistance of the battery is reduced, the rate performance and cycle stability of the battery are improved, and the energy density of the battery is enhanced.

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Abstract

The invention provides an electrode plate, a battery and an electric device. The electrode pole piece comprises a current collector, a bottom coating and an active layer, wherein the bottom coating is positioned between the current collector and the active layer; the bottom coating layer comprises a conductive agent, the active layer comprises an active material and a first liquid absorption material, and the liquid absorption rate of the first liquid absorption material is larger than or equal to 110%.
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