Nano silicon material, method for producing same, and negative electrode of secondary battery
US10347910B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | May 26, 2015 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | May 26, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A nano silicon material having reduced amounts of oxygen (O) and chlorine (Cl) contained therein is provided.The nano silicon material contains fluorine (F) and nano-sized silicon crystallites. Generation of a layer in which oxygen (O) and chlorine (Cl) are present is suppressed due to the presence of fluorine (F), so that a decrease in the moving speed of lithium ions is suppressed. In addition, due to the presence of fluorine (F), the concentrations of oxygen (O) and chlorine (Cl) are reduced, so that reaction thereof with lithium ions is suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.