Positive electrode active material with improved output and lithium secondary battery comprising the same
US9660259B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2014 |
| Grant date | May 23, 2017 |
| Priority date | — |
| Expiry date | Apr 30, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A mixed positive electrode active material comprising a lithium manganese oxide represented by following [Chemical Formula 1] and a second positive electrode active material represented by following [Chemical Formula 2], and a lithium secondary battery comprising the same are disclosed.aLi2MnO3.(1−a)LixMO2 [Chemical Formula 1]In [Chemical Formula 1], 0<a<1, 0.9≦x≦1.2, and M is at least one element selected from the group consisting of Al, Mg, Mn, Ni, Co, Cr, V and Fe.Li4-xMn5-2x-yCO3xMyO12 [Chemical Formula 2]In [Chemical Formula 2], 0<x<1.5, 0≦y<0.5, and M is at least one of transition metal elements.By comprising Mn-rich and Co-doped Li4Mn5O12, a rapid output decrease at a low SOC section may be relaxed to enlarge an available SOC section. Improved output may be obtained throughout an entire SOC section when compared with a case using pure Li4Mn5O12.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.