Cathode active material for lithium secondary battery, method of fabricating the same, and lithium secondary battery including the same
US9871250B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2014 |
| Grant date | Jan 16, 2018 |
| Priority date | — |
| Expiry date | Sep 18, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided are a cathode active material for a lithium secondary battery, a method of fabricating the same, and a lithium secondary battery including the same. The cathode active material includes a lithium composite transition metal oxide represented by Li1+(c-a)/2NiaCobMncO2-xFx (0.1≦c−a≦0.4, 0.13≦a≦0.3, 0.03≦b≦0.2, 0.4≦c≦0.6, (a+b+c)+(1+(c−a)/2)=2, 0<x≦0.15, 1≦a/b≦6, 1.9≦c/a≦4.0, and 0.04≦b/(a+b+c)≦0.25), and layer-structured Li2MnO3. Since the lithium secondary battery including the cathode active material has a large capacity and generates less gas, lifespan characteristics and high rate capability are significantly improved, and especially voltage variation during charging and discharging operations is small.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.