Negative electrode active material, mixed negative electrode active material, and method of producing negative electrode active material
US11594716B2 · kind B2 · utility
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Key dates
| Filing date | Jan 19, 2018 |
| Grant date | Feb 28, 2023 |
| Priority date | — |
| Expiry date | Aug 11, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A negative electrode active material containing a negative electrode active material particle which includes a silicon compound particle containing a silicon compound (SiOx: 0.5≤x≤1.6). The silicon compound particle has three or more peaks in a chemical shift value ranging from −40 ppm to −120 ppm but has no peak in a chemical shift value within a range of −65±3 ppm in a spectrum obtained from 29Si-MAS-NMR of the silicon compound particle. This provides a negative electrode active material capable of improving cycle characteristics when it is used as a negative electrode active material for a secondary battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.