Positive electrode material for secondary lithium battery
US6087042A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1999 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | Feb 23, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a positive electrode material for a secondary lithium battery excellent in high temperature cycle characteristics which is a lithium manganese oxyfluoride having a spinel structure, wherein the oxyfluoride has a composition represented by the composition formula: EQU Li.sub.1+x Mn.sub.2-x O.sub.4-y F.sub.z wherein x represents a number of from 0.0133 to 0.3333; y represents a number of from 0 to 0.2 (exclusive of 0); and z represents a number of from 0.01 to 0.2 (exclusive of 0.01), with the proviso that (y-z) is more than 0 but not more than 0.07. The positive electrode material for a secondary lithium battery of the present invention exhibits not only a high cycle durability of charge/discharge but also a minimum drop of a charge/discharge initial capacity to provide a high energy density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.