Lithium secondary battery
US7452636B2 · kind B2 · utility
4Cited by
1References
2Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 4, 2004 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | Nov 5, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lithium secondary battery including a positive electrode, a negative electrode including a carbon material as an active material, and a nonaqueous electrolyte comprising a solute dissolved in a nonaqueous solvent in which γ-butyrolactone is the main solvent, wherein the carbon material has a ratio (ID/IG) of a Raman spectrum intensity (a peak intensity ratio) (R) obtained by Raman spectroscopy of 0.2 or greater, and the nonaqueous electrolyte includes at least 0.1 part by weight of vinylene carbonate and at least 0.1 part by weight of vinyl ethylene carbonate in 100 parts by weight of the nonaqueous electrolyte.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.