Nonaqueous electrolyte secondary battery
US6994936B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 2002 |
| Grant date | Feb 7, 2006 |
| Priority date | — |
| Expiry date | Jan 24, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention is characterized in that a nonaqueous electrolyte contains a sultone compound having unsaturated bonds, and the present invention thereby aims at suppressing the swelling of a nonaqueous electrolyte secondary battery, as represented by a lithium secondary battery, after being allowed to stand at a high temperature and at obtaining an excellent high temperature standing performance. Furthermore, by making the nonaqueous electrolyte contain, in addition to the sultone compound containing unsaturated bonds, a vinylene carbonate derivative in 1.0 wt % or below, and/or a cyclic sulfate in 2.0 wt % or below, there can be obtain a nonaqueous electrolyte secondary battery which prevents the initial discharge capacity degradation, occurring when the addition amount of the sultone compound having unsaturated bonds is increased, and has an excellent high temperature standing performance and a large initial discharge capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.