▎ 摘　　要

NOVELTY - Preparing modified ternary positive electrode material involves preparing graphene quantum dots by a hydrothermal method; mixing the ternary precursor and the lithium source, and performing a calcination to obtain a ternary positive electrode first-fired product; mixing the graphene quantum dots and the first-fired ternary positive electrode in a dispersant, and performing secondary calcination to obtain the modified ternary positive electrode material. USE - Method for preparing modified ternary positive electrode material for use in lithium ion battery (claimed). ADVANTAGE - The graphene quantum dots and the ternary cathode material are synthesized in two steps and then mixed and coated to prepare the modified ternary cathode material coated with the graphene quantum dots, so that the preparation process is optimized, the ionic conductivity and the chemical stability of the ternary cathode material are improved, and the electrochemical performance of the ternary cathode material is further improved. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a modified ternary cathode material.