Negative electrode material, non-aqueous electrolyte secondary battery, and method of producing the same
US11296314B2 · kind B2 · utility
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Key dates
| Filing date | Feb 28, 2019 |
| Grant date | Apr 5, 2022 |
| Priority date | — |
| Expiry date | Jan 3, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A negative electrode material contains composite particles. Each of the composite particles contains a negative electrode active material particle and a film. The negative electrode active material particle contains a silicon oxide phase and a lithium silicate phase. The film covers a surface of the negative electrode active material particle. The film contains an anion-exchange resin. To an ion-exchange group of the anion-exchange resin, a fluoride ion is bound. The content of the anion-exchange resin in the negative electrode material is not higher than 33 mass %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.