Tsinghua University

Ying-Qiang Wu

Li Wang

Xiang-Ming He

The present disclosure relates to a method for making a cathode active material coating liquid including steps of forming a phosphate ester solution by adding a phosphate ester in an alcoholic solvent, introducing an aluminum salt to the phosphate ester solution, the aluminum salt being soluble to the alcoholic solvent, and the aluminum salt reacting with the phosphate ester to form a homogeneous clear solution, and adding an acidity regulator to adjust a pH value of the homogenous clear solution to 6 to 7. The present disclosure also relates to a cathode active material coating liquid and a method for coating the cathode active material.

Coating liquid for cathode active material, method for making the same, and method for coating cathode active material

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.

Method for making cathode active material coating liquid and method for coating cathode active material

The present disclosure relates to a method for making a cathode active material coating liquid including steps: forming a phosphate ester solution by adding a phosphate ester in an alcoholic solvent; and introducing an aluminum salt to the phosphate ester solution, the aluminum salt being soluble to the alcoholic solvent, and the aluminum salt reacting with the phosphate ester to form a homogeneous clear solution. The present disclosure also relates to a cathode active material coating liquid and a method for coating the cathode active material.

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Suzhou, China

Ying-Qiang Wu