一种负极活性材料、负极极片、二次电池和电子设备
By controlling the particle size distribution and isotropic properties of the negative electrode active material, a graphite material with a narrow particle size distribution and strong isotropic properties was prepared and applied to the negative electrode sheet. This solved the problem of insufficient cycle performance and expansion performance of traditional graphite materials in lithium-ion batteries and improved the overall performance of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGDE AMPEREX TECHNOLOGY LTD
- Filing Date
- 2023-08-11
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional lithium-ion batteries using artificial graphite as the negative electrode active material suffer from insufficient cycle performance and expansion performance. In particular, the low cycle capacity retention and cycle expansion phenomenon of natural graphite affect the overall performance of lithium-ion batteries.
By controlling the particle size distribution and isotropic properties of the negative electrode active material, specifically by controlling Dn10, Dv50, Dv90, I/D, sphericity C, tap density TD, degree of graphitization G, specific capacity W, and Id/Ig value in the Raman spectrum, a graphite material with a narrow particle size distribution and strong isotropic properties was prepared and applied to the negative electrode sheet to improve the cycle performance, expansion performance, and rate performance of secondary batteries.
It improves the cycle performance, expansion performance, and rate performance of secondary batteries, enhances the energy density and processing performance of batteries, takes into account the diffusion path of active ions and the deformation of electrode sheets, and improves the overall performance of lithium-ion batteries.
Smart Images
Figure CN117059800B_ABST