▎ 摘　　要

NOVELTY - Preparation of lithium difluorooxalato borate involves (s1) using potassium vanadium fluorophosphate/potassium ferrophosphate graphite electrode as positive electrode, modified by graphene oxide as negative electrode, configured in electrolytic cell, arranging cation exchange membrane to separate into a positive electrode area and negative electrode area, sequentially arranged positive electrode and negative electrode, and (s2) injecting dimethyl carbonate solution of potassium difluorooxalate into the positive electrode area as the electrolyte in the negative electrode area, injecting lithium salt solution into the negative electrode area as the electrolyte in the negative electrode area, carrying out pulse charging and discharging, carrying out one-time discharging and one-time charging in sequence to form cycle, separating the electrolyte in the positive electrode area, concentrating and crystallizing. USE - Preparation of lithium difluorooxalato borate used for lithium battery. ADVANTAGE - The method enables efficient and rapid preparation of lithium difluorooxalato borate by electrochemical method, and the preparation process does not use silicon tetrachloride and other severely polluting raw material or pollutant discharge, so that the production process is environmentally-friendly.