Cathode active material and lithium secondary battery comprising the same
US9786911B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Jun 21, 2012 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | Jun 21, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a cathode active material for secondary batteries comprising at least one compound selected from the following formula 1:(1−s−t)[Li(LiaMn(1−a−x−y)NixCoy)O2]*s[Li2CO3]*t[LiOH] (1)wherein 0<a<0.2, 0<x<0.9, 0<y<0.5, a+x+y<1, 0<s<0.03, and 0<t<0.03; and a, x and y represent a molar ratio, and a and t represent a weight ratio. The cathode active material has long lifespan at room temperature and high temperatures and provides superior stability, although charge and discharge are repeated at a high current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.