Anode active material for lithium secondary battery, method of forming the same and lithium secondary battery including the same
US11688854B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2022 |
| Grant date | Jun 27, 2023 |
| Priority date | — |
| Expiry date | Mar 11, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An anode active material for a lithium secondary battery and a lithium secondary battery are provided. The anode active material includes a carbon-based particle including pores formed in at least one of an inside of the particle and a surface of the particle and having a pore size of the carbon-based particle is 20 nm or less, and silicon formed at an inside of the pores of the carbon-based particle or on the surface of the carbon-based particle. A peak intensity ratio in a Raman spectrum of silicon defined as I(515)/I(480) is 1.2 or less. Difference between volume expansion ratios of carbon and silicon can be reduced to improve life-span property of the secondary battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.