Ni-based lithium transition metal oxide
US7648693B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2005 |
| Grant date | Jan 19, 2010 |
| Priority date | — |
| Expiry date | Aug 20, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/129
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a powderous lithium transition metal oxide with the composition as represented by the below Formula and prepared by solid state reaction in air from a mixed transition metal precursor and Li2CO3, with being practically free of Li2CO3 impurity:LixMyO2 wherein The Ni-based lithium transition metal oxide according to the present invention has a well-layered structure, and also improved safety, cycling stability and stability against aging and low gas evolution during storage, when used as an active material for cathode of lithium secondary batteries, because it has a high sintering stability and is substantially free of soluble bases.Moreover, the lithium transition metal oxide of the present invention can be prepared by a low-cost process using a mixed transition metal precursor and Li2CO3 as raw stocks and under relatively unrestricted conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.