Method for making cathode active material coating liquid and method for coating cathode active material
US10818918B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2018 |
| Grant date | Oct 27, 2020 |
| Priority date | — |
| Expiry date | Nov 22, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present disclosure provides a method for making a cathode active material coating liquid. A phosphate ester solution is formed by adding a phosphate ester in an alcoholic solvent. An aluminum nitrate is introduced in the phosphate ester solution. The aluminum nitrate is soluble to the alcoholic solvent, and reacts with the phosphate ester to form a homogeneous clear solution. A pH value of the homogeneous clear solution is regulated to a range from about 6 to about 7 by adding an acidity regulator. The acidity regulator contains ammonium cation. The ammonium nitrate is removed from the clear solution after regulating the pH value. A method for coating the cathode active material is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.