Nickel-rich quaternary metal oxide materials as cathodes for lithium-ion and lithium-ion polymer batteries
US6623886B2 · kind B2 · utility
10Cited by
55References
15Claims
0Family size
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Key dates
| Filing date | Dec 21, 2000 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Dec 21, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Positive electrode-active materials for use in lithium-ion and lithium-ion polymer batteries contain quaternary composite oxides of manganese, nickel, cobalt and aluminum where one of the four is present at levels of over 70 mol percent. The composite oxides can be lithiated to form positive electrode-active materials that are stable over at least ten charge/discharge cycles at voltage levels over 4.8 volts, and have capacities of over 200 mAh/g. Methods for producing the materials and electrochemical cells and batteries that include the materials are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.