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

• Main Authors: He, Xiang-Ming, Wu, Ying-Qiang, Wang, Li
• Format: Patent
• Language: English
• Published: 03.11.2020
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; CABLES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; COMPOUNDS THEREOF; CONDUCTORS; CORRECTING FLUIDS; DYES; ELECTRICITY; FILLING PASTES; INKS; INORGANIC CHEMISTRY; INSULATORS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-METALLIC ELEMENTS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; USE OF MATERIALS THEREFOR; WOODSTAINS

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.