Mixed phase lithium metal oxide compositions with desirable battery performance
US9070489B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2013 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Jul 25, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/11
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Mixed phase complex lithium metal oxides are described with an overall stoichiometry represented by a formula Li1+aNibCocMndOx, −0.05≦a≦0.14, 0.1≦b≦0.25, 0≦c≦0.2, 0.45≦d≦0.8, a+b+c+d=1 and (1+a)/(b+c+d)≦1.325. The compositions are generally very high in manganese content. The compositions can have x-ray diffractograms and differential capacity profiles suggesting the presence of a layered (Li2MnO3)—layered (LiMetalO2)—spinel crystal structure. The compositions can exhibit surprisingly low first cycle irreversible capacity losses while maintaining high specific discharge capacities, even at high discharge rates. Stabilizing coatings have been found to further significantly improve performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.