Low-swelling graphite anode material, preparation method thereof and lithium ion battery
US11855288B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2019 |
| Grant date | Dec 26, 2023 |
| Priority date | — |
| Expiry date | Jul 15, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A low-swelling graphite anode material, a preparation method thereof, and a lithium ion battery including the graphite anode material. The preparation method of the graphite anode material includes: (1) mixing a graphite raw material with a modifier, and then performing heating modification; (2) performing heat treatment on the modified graphite under a protective atmosphere; and (3) performing post-treatment on the heat-treated graphite to obtain the graphite anode material. The graphite anode material has an extremely low swelling rate, excellent cycle performance, and outstanding rate performance, an swelling rate being 24.3% or lower, a normal temperature 10C/1C discharge capacity retention rate being greater than 90%, and a capacity retention rate after charging and discharging for 300 times being 91% or greater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.