Positive active material for rechargeable lithium batteries and method for preparing same
US6753111B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2001 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Apr 21, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided are a positive active material and a method of preparing for the same. The positive active material comprises a core and a surface-treatment layer on the core. The core includes at least one lithiated compound, and the surface-treatment layer includes at least one coating element-included oxide. The lithiated compound includes a secondary particle of which average particle size is larger than or equal to 1 &mgr;m and less than 10 &mgr;m. The secondary particle is formed of an agglomeration of small primary particles of an average size of 1 to 3 &mgr;m in diameter. The positive active material is prepared by coating the lithiated compound with an organic solution or an aqueous solution including a coating-element source and heat-treating the coated compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.