METHOD FOR ULTRASONIC-CHEMICALLY PREPARING VOPO4.2H2O, AND APPLICATION OF THE PRODUCT FOR LITHIUM SECONDARY BATTERY POSITIVE ELECTRODE MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a new method for preparing VOPO4 .2H2 O having small sized particles while remarkably reduced reaction time. SOLUTION: The method includes a process for mixing V2 O5 ,H3 PO4 and H2 O with each other in a molar ratio V2 O5 :H3 PO4 :H2 O of 1:(40-50):(500-610), a process for treating the mixed solution with ultrasonic wave, a process for washing the material obtained by ultrasonic treatment and vacuum-filtering, and a process for drying and recovering the material obtained by the filtration.