Non-aqueous electrolyte secondary battery
US6083644A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1997 |
| Grant date | Jul 4, 2000 |
| Priority date | — |
| Expiry date | Nov 26, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A 1.5 V non-aqueous electrolyte secondary battery having high energy density, excellent charge and discharge characteristics and long cycle life is provided. The non-aqueous electrolyte secondary battery uses, as the negative electrode active material, lithium-containing silicon oxide represented by the compositional formula Li.sub.x SiO.sub.y and defined such that the lithium content x and oxygen amount y are satisfied with 1.5.ltoreq.x.ltoreq.4.5 and 0<y<2, respectively, and also uses, as the positive electrode, lithium-containing titanium oxide represented by the general formula Li.sub.x Ti.sub.y O.sub.4 wherein 0.ltoreq.x.ltoreq.3 and 1.6.ltoreq.y.ltoreq.2.2 or lithium-containing iron sulfide represented by the general formula Li.sub.x FeS.sub.y wherein x.ltoreq.1.1 and 0.5.ltoreq.y.ltoreq.2.5, so that a secondary battery of about 1.5 V having high energy density, less inner resistance and excellent charge and discharge characteristics can be obtained. The non-aqueous electrolyte secondary battery has high charge and discharge efficiency, does not cause defect such as inner short-circuit due to formation of dendrite, and it is very stable with a long cycle life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.