Lithium ion secondary battery, method for manufacturing the same, and electric device
By using a combination of multi-component polymers and carbon nanotubes in lithium-ion secondary batteries, the problem of negative electrode expansion was solved, thereby improving the cycle life and performance of the battery.
CN122158656APending Publication Date: 2026-06-05CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2024-12-05
- Publication Date
- 2026-06-05
Smart Images
Figure CN122158656A_ABST
Abstract
The application belongs to the technical field of batteries, and specifically discloses a lithium ion secondary battery, a preparation method thereof and an electric device. The lithium ion secondary battery comprises a negative electrode sheet, and the negative electrode sheet comprises a negative electrode film layer, wherein the negative electrode film layer comprises a negative electrode active material, a multi-element polymer and carbon nanotubes, and the multi-element polymer comprises a structural unit derived from an acrylic monomer, a structural unit derived from an acrylic ester monomer, a structural unit derived from an acrylamide monomer and a structural unit derived from an acrylonitrile monomer. The design provided in the application can improve the cycle service life of the battery by reducing the expansion degree of the negative electrode sheet.
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