Lithium doped silicon oxide-based negative electrode material and method of manufacturing the same
US11031592B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 2017 |
| Grant date | Jun 8, 2021 |
| Priority date | — |
| Expiry date | Dec 28, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
[Problem] Provided is a silicon oxide-based negative electrode material capable of avoiding, as much as possible, decreased battery performance resulting from a heterogeneous distribution of a Li concentration. [Solution] Provided is a powder having an average composition of SiLixOy wherein 0.05<x<y<1.2 and a mean particle size of 1 μm or more. Further, 10 particles randomly selected from particles of the powder each satisfy 0.8<L1/L2<1.2 with the standard deviation of L2 being 0.1 or less, L1 being a Li concentration at a depth of 50 nm from an outermost surface of each of the 10 particles, and L2 being a Li concentration at a depth of 400 nm from the outermost surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.