Positive active material for rechargeable lithium battery and method of preparing same
US6555269B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2001 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | May 20, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a positive active material for a rechargeable lithium battery and a method of preparing the same. The positive active material includes a LiCoO2 core and a metal selected from a group consisting of Al, Mg, Sn, Ca, Ti, Mn and mixtures thereof. The metal has a concentration gradient from a surface of the core to a center of the core.The method of preparing a positive active material for a rechargeable lithium battery includes the steps of dissolving a metal compound in alcohol to prepare a metal compound solution in a sol state, coating LiCoO2 with the metal compound solution in the sol state and sintering the coated LiCoO2 at 150 to 500° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.