Cathode material of lithium cobalt oxide for a lithium ion secondary battery and preparation methods and applications thereof
US10541414B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2017 |
| Grant date | Jan 21, 2020 |
| Priority date | — |
| Expiry date | Mar 15, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a cathode material of lithium cobalt oxide for a lithium ion secondary battery and preparation methods and applications thereof. A cathode material comprises a core material and a coating layer, wherein the core material is LixCo(1−y)AyO(2+z), wherein 1.0≤x≤1.11, 0≤y≤0.02, −0.2<z<0.2, and A is one or two or more selected from the group consisting of Al, Mg, Y, Zr and Ti, wherein the coating layer is LiaMbBcOd, wherein M is a lithium ion active metal element and one or two or more selected from the group consisting of Co, Ni, Mn and Mo, and B is an inactive element, and one or two or more selected from the group consisting of Al, Mg, Ti, Zr and Y, and 0.95<b+c<2.5, and the molar ratio of Li to the active metal element M is 0<a/b<1. The battery prepared by the cathode material has advantages of high capacity, high compacted density and excellent cycling stability etc., under high voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.