Negative electrode active material, method for producing same, and electrical storage device
US10333139B2 · kind B2 · utility
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2References
18Claims
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Key dates
| Filing date | Nov 14, 2014 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | May 30, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a negative electrode active material including complex particles formed of: nano silicon aggregated particles produced by heating a layered polysilane represented by a composition formula of (SiH)n and having a structure in which multiple six-membered rings formed from silicon atoms are connected; and a composited carbon layer formed from an amorphous carbon and at least covering one portion of the aggregated particles. A mean particle diameter D50 of the aggregated particles is within a range of 0.2 μm to 30 μm, and a mean particle diameter D50 of the complex particles is within a range of 0.5 μm to 40 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.