Impurity containing cathode material with preferred morphology and method to prepare from impurity containing metal carbonate
US10411258B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 30, 2015 |
| Grant date | Sep 10, 2019 |
| Priority date | — |
| Expiry date | Oct 30, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A carbonate precursor compound for manufacturing a lithium metal (M)-oxide powder usable as an active positive electrode material in lithium-ion batteries, M comprising 20 to 90 mol % Ni, 10 to 70 mol % Mn and 10 to 40 mol % Co, the precursor further comprising a sodium and sulfur impurity, wherein the sodium to sulfur molar ratio (Na/S) is 0.4<Na/S<2. The lithium metal (M)-oxide powder has a particle size distribution with 10 μm≤D50≤20 μm, a specific surface with 0.9≤BET≤5, the BET being expressed in g/cm2, the powder further comprises a sodium and sulfur impurity, wherein the sum (2*Nawt)+Swt of the sodium (Nawt) and sulfur (S wt) content expressed in wt % is more than 0.4 wt % and less than 1.6 wt %, and wherein the sodium to sulfur molar ratio (Na/S) is 0.4<Na/S<2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.