Natural graphite, electrochemical device and preparation method of natural graphite
By doping P and/or N elements in natural graphite and adopting gradient distribution technology, combining high-frequency thermal shaping and cold quenching treatment preparation methods, the problem of poor circulation and storage performance of natural graphite in lithium-ion batteries is solved, and higher battery performance and service life are achieved.
Patent Information
- Application Number
- CN202411962908.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2044-12-27
AI Technical Summary
As a negative electrode material for lithium-ion batteries, natural graphite has poor circulation and storage performance, mainly due to its abundant pores and functional groups, which are prone to side reactions with the electrolyte, and lattice expansion and particle peeling are prone to occur during charging and discharging.
Through the gradient distribution of doping elements P and/or N in the natural graphite core, a hard inside and soft outside are formed to reduce side reactions and expansion problems. At the same time, high-frequency thermal shaping and cold quenching treatment are used during the preparation process to optimize the structure and performance of the material.
It significantly improves the circulation and storage performance of natural graphite, improves the charging and discharge capacity and rate performance of the battery, reduces the expansion and side reaction of the material, and extends the service life of the battery.