Lithium nickel manganese cobalt composite oxide and lithium rechargeable battery
US9136533B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2006 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Nov 13, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention provides a lithium nickel manganese cobalt composite oxide having a composition of LiaNixMnyCozO2 (x+y+z=1, 1.05<a<1.3), wherein, in the data obtained by measuring a Raman spectrum of the composite oxide, the peak intensity of an Eg oscillation mode of a hexagonal crystal structure located at 480 to 495 cm−1 and the peak intensity of an F2g oscillation mode of a spinel structure located at 500 to 530 cm−1 in relation to the peak intensity of an A1g oscillation mode having a hexagonal crystal structure in which the main peak is located at 590 to 610 cm−1 are respectively 15% or higher and 40% or lower than the peak intensity of the A1g oscillation mode of a hexagonal crystal structure as the main peak. Thereby, the Raman spectrum can be used for the identification of the crystal structure to clarify the characteristics of a positive electrode precursor composed of lithium nickel manganese cobalt composite oxide. In particular, it is possible to obtain lithium nickel manganese cobalt composite oxide and a lithium rechargeable battery superior in rate characteristics and cycle characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.