Production method of negative electrode material for lithium ion secondary battery
A specialized negative electrode material for lithium-ion batteries, featuring controlled graphite particle properties and composite structures, addresses the need for improved high-temperature resistance and fast charging by minimizing electrolyte decomposition and maintaining electrolyte flow, enhancing battery performance in automotive applications.
Patent Information
- Application Number
- TW110146935
- Authority / Receiving Office
- TW · TW
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2020-12-16
- Filing Date
- 2021-12-15
- Publication Date
- 2026-08-01
- Estimated Expiration
- 2041-12-14
AI Technical Summary
Lithium-ion secondary batteries used in automotive applications require improved high-temperature resistance and fast charging performance to meet the demands of predictable daytime operation in business vehicles and widespread adoption in tropical regions, while also coping with frequent charging.
A negative electrode material for lithium-ion secondary batteries is developed, comprising graphite particles with specific surface area below 2.7 m²/g, compression pressure above 2.8 kN/cm², and an elastic energy/plastic deformation energy ratio of 4 or higher, formed into composite particles with stacked flat graphite structures, manufactured through graphitizing coke under controlled conditions.
The material provides lithium-ion secondary batteries with enhanced high-temperature resistance and fast-charging capabilities, reducing electrolyte decomposition and ensuring effective electrolyte flow and diffusion channels.