Non-aqueous electrolyte lithium secondary battery
US6274271A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1997 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | Aug 21, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A non-aqueous electrolyte lithium secondary battery comprising a negative electrode of spinel-type lithium-titanium oxide with improved overcharge and overdischarge characteristics is disclosed. In this battery, the rechargeable electric capacity of the negative electrode is adjusted to be smaller than that of the positive electrode. In a preferable mode, the negative electrode may further comprise a material which has more negative potential than that of the lithium-titanium oxide, and shows electrochemical reversibility. An electrolyte comprising ethylene carbonate and LiN(CF.sub.3 SO.sub.2).sub.2 or LiN(C.sub.2 F.sub.5 SO.sub.2).sub.2 is preferable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.