Lithium cobalt oxide positive electrode material, method for preparing same, and lithium-ion secondary battery
US10790511B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2019 |
| Grant date | Sep 29, 2020 |
| Priority date | — |
| Expiry date | May 24, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present application provides a lithium cobalt oxide positive electrode material, that is, a doped lithium cobalt oxide material: A general formula of doped lithium cobalt oxide is Li1+zCo1−x−yMaxMbyO2, where 0≤x≤0.01, 0≤y≤0.01, and −0.05≤z≤0.08; Ma is a doped monovalent element, and is at least one of Al, Ga, Hf, Mg, Sn, Zn, or Zr; and Mb is a doped polyvalent element, and is at least one of Ni, Mn, V, Mo, Nb, Cu, Fe, In, W, or Cr. Through substitutional doping of a monovalent element, mutation of a layered structure caused by lithium deintercalation is minimized. Through interstitial doping of a polyvalent element, oxidation of Co3+ is alleviated and delayed during charging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.