Surface treatment method for lithium cobalt oxide, and lithium secondary battery comprising same
US10593943B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jan 11, 2016 |
| Grant date | Mar 17, 2020 |
| Priority date | — |
| Expiry date | Feb 27, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a surface treatment method for lithium cobalt oxide, comprising the steps of: (S1) mixing lithium cobalt oxide and an organic phosphoric acid compound; and (S2) heat treating and calcining the mixture prepared in step (S1). The surface treatment method of the present invention is simpler and has higher reproducibility than a conventional surface coating and doping technique, and can improve electrochemical characteristics by reinforcing the structural stability of lithium cobalt oxide. In addition, LiCoO2 prepared by the surface treatment method of the present invention is structurally stable during charging/discharging and does not cause unnecessary phase transition, and thus has excellent lifetime characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.