Cathode active material, lithium secondary battery having same, and method for preparing same
US10367199B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2014 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Jun 28, 2035 |
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 cathode active material, a lithium secondary battery having the same, and a method for preparing the same, and the purpose of the present invention is to provide battery properties and thermal stability under a high temperature environment even if the Ni content of M in LiMO2(M=Ni, Co, Ti, Zr, etc.) of layered oxide is increased to 65% or more. The present invention provides a cathode active material for a lithium secondary battery which is represented by chemical formula 1 below and is obtained by substituting a part of Ni, Co and Mn for a dissimilar metal (M) through heat treatment with a lithium source after coating the dissimilar metal (M) on the surface of a transition metal precursor comprising Ni, Co and Mn. LiNiaCobMncMdO2 [Chemical Formula 1]
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.