Lithium manganese-based composite oxide and method for preparing the same
US8021783B2 · kind B2 · utility
1Cited by
2References
10Claims
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Key dates
| Filing date | Mar 20, 2007 |
| Grant date | Sep 20, 2011 |
| Priority date | — |
| Expiry date | May 30, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a lithium manganese-based composite oxide represented by the compositional formula: Li1+x(Mn1-m-nFemTin)1−xO2, wherein 0<x<⅓, 0≦m≦0.75, 0.01≦n≦0.75, and 0.01≦m+n<1, and comprising a crystal phase of layered rock-salt type structure. The composite oxide is capable of maintaining an average discharge voltage of 3 V or more over long charge/discharge cycles. The composite oxide can be prepared using lower-cost starting materials, and exhibits improved charge/discharge characteristics over conventional low-cost positive electrode materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.