一种负极活性材料、二次电池及电子装置
By using silicon-based composite materials in lithium-ion batteries, controlling the Raman spectrum ratio and powder conductivity, and forming a complete conductive network, the problem of increased porosity in the negative electrode caused by silicon material expansion is solved, thus improving the battery's cycle performance and expansion performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGDE AMPEREX TECHNOLOGY LTD
- Filing Date
- 2023-09-25
- Publication Date
- 2026-07-17
AI Technical Summary
The volume expansion of silicon materials during the charging and discharging process in lithium-ion batteries leads to an increase in the porosity of the negative electrode sheet, affecting the battery's expansion performance and cycle life.
A silicon-based composite material, including a silicon matrix, a conductive agent, and a polymer, is used. By adjusting the Raman spectral ratio A and the powder conductivity, a complete conductive network is formed, releasing the stress caused by silicon expansion and alleviating the expansion of the negative electrode sheet.
It improves the cycle performance and expansion performance of secondary batteries, reduces the increase in porosity of negative electrode sheets caused by silicon expansion stress, and improves battery stability and lifespan.
Smart Images
Figure CN117174888B_ABST