Negative pole piece, solid-state battery and activation method
By using a combination of composite current collector and silicon negative electrode coating in the negative electrode sheet of solid state battery, the problem of excessive stress during the deintercalation of lithium in the silicon negative electrode sheet is solved, and the electrochemical performance and stability of the battery are significantly improved.
CN119650591APending Publication Date: 2025-03-18CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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Patent Information
- Application Number
- CN202411549905.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-03-18
AI Technical Summary
Technical Problem
The existing silicon negative electrode sheets generate huge stress during the deintercalation of lithium, resulting in degradation of electrochemical performance and battery failure.
Method used
The composite fluid collector is used as the basis of the negative electrode sheet, including a metal layer and an elastomeric layer, and the silicon negative electrode coating is arranged on at least one side of the composite fluid collector to reduce stress and improve battery performance.
Benefits of technology
During the deintercalation process of lithium, reduce stress, stabilize activation capacity, reduce electrical performance attenuation, and improve the overall performance of solid-state batteries.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides a negative pole piece. According to the embodiment of the invention, the negative pole piece comprises a composite current collector; the silicon negative electrode coating is arranged on at least one side of the composite current collector; wherein the composite current collector comprises metal layers and an elastomer layer, and the metal layers are arranged on the two sides of the elastomer layer. According to the negative pole piece disclosed by the embodiment of the invention, the stress generated in the lithium de-intercalation process is reduced, the capacity in the activation process is more stable, the attenuation is less, and the performance of a solid-state battery is positively improved.
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