▎ 摘　　要

NOVELTY - Preparing composite quaternary anode material, comprises (i) mixing quaternary anode material with polyvinyl alcohol sol to obtain quaternary anode slurry, and (ii) mixing the quaternary anode slurry with graphene oxide dispersion liquid, and performing thermal reduction treatment to obtain final product. USE - The composite quaternary anode material is useful in anode pole piece for lithium-ion battery (all claimed). ADVANTAGE - The method: utilizes polyvinyl alcohol to coat graphene oxide on the quaternary anode, and can obtain a graphene coating layer with excellent graphene bonding state and low damage. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: composite quaternary anode material prepared by above method; anode pole piece; and lithium ion battery.