Composite for cathode of Li-ion battery, its preparation process and the Li-ion battery
US10693131B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2018 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | Aug 2, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A composite for the cathode of Li-ion battery is disclosed and comprises: a base active material represented by Li1+a(N1−b−cCobMnc)O2 wherein 0≤a≤0.5, 0≤b≤0.4, 0≤c≤0.6, with b+c<1; and a coating on the base active material comprising a phase containing the components B2O3 or SnBxO2+3x/2−y/2Fy; wherein 0≤x≤5, 0<y<4+3x; wherein relative to the total amount of the base active material, the weight percentage of B element is not more than 2 wt %, the weight percentage of Sn element is not more than 5 wt %. A method for making a composite is disclosed and includes: mixing the base active material with the phase components and/or a precursor for the phase components; and firing the mixture obtained. The application provides a high capacity, long cycle life cathode material that is stabilized at high voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.