Positive electrode active material for lithium secondary cell
US10141570B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2015 |
| Grant date | Nov 27, 2018 |
| Priority date | — |
| Expiry date | Sep 3, 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 positive electrode active material including a lithium metal composite oxide having a layer crystal structure, and provides a novel positive electrode active material for a lithium secondary cell, which can suppress the reaction with an electrolyte solution and can raise the charge-discharge cycle ability of the cell, and can make good the output characteristics of the cell. There is proposed a positive electrode active material for a lithium secondary cell, including an active particle having a surface portion where one or a combination of two or more (these are referred to as “surface element A”) of the group consisting of Al, Ti and Zr is present, on a surface of a particle including a lithium metal composite oxide having a layer crystal structure and represented by the general formula: Li1+xM1−xO2 (wherein M is one or a combination of two or more (these are referred to as “constituent element M”) of the group consisting of Mn, Co, Ni, transition elements of from the third group elements to the 11th group elements of the periodic table, and typical elements up to the third period of the periodic table), wherein the ratio (CA/CM) of a concentrat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.