Method for producing silicon-based negative electrode active material, negative electrode active material for lithium secondary battery, and lithium secondary battery comprising same
US9660254B2 · kind B2 · utility
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Key dates
| Filing date | Aug 31, 2012 |
| Grant date | May 23, 2017 |
| Priority date | — |
| Expiry date | Oct 26, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method for preparing a silicon-based negative electrode active material, a negative electrode active material for a lithium secondary battery, and a lithium secondary battery comprising the same. More particularly, the method for preparing the silicon-based negative electrode active material comprises: preparing a porous silica (SiO2) and a thin metal film; coating the porous silica onto the thin metal film; reducing the porous silica to a porous silicon by performing heat-treatment of the thin metal film and the porous silica; and obtaining the porous silicon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.