Additive for lithium ion rechageable battery cells
US8945774B2 · kind B2 · utility
47Cited by
48References
38Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 7, 2011 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Jun 7, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention claims the addition of vinylene carbonate (VC) and optionally also fluoroethylene carbonate to the electrolyte of lithium ion cells having a structural silicon composite anode, i.e. an anode containing fibers or particles of silicon. The additive significantly improves the cycling performance of the cells. A VC content in the range 3.5-8 wt % based on the weight of the electrolyte has been found to be optimum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.