Nonaqueous electrolyte secondary battery
US8268485B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Aug 30, 2004 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Nov 10, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A nonaqueous electrolyte secondary battery which has a positive electrode containing lithium cobalt oxide as a positive active material, a negative electrode containing a graphite material and a nonaqueous electrolyte solution containing ethylene carbonate as a solvent and which is charged with an end-of-charge voltage of at least 4.3 V. Characteristically, the battery uses, as the positive active material, lithium cobalt oxide obtained by firing a mixture of a lithium salt, tricobalt tetraoxide (Co3O4) and a zirconium compound and having particle surfaces onto which the zirconium compound adheres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.