▎ 摘　　要

NOVELTY - A graphene/tin dioxide alternating layer stacking composite fiber comprises alternating stack of graphene layer and tin dioxide layer. USE - Graphene/tin dioxide alternating layer stacking composite fiber used as cathode of lithium ion battery (claimed). ADVANTAGE - The graphene/tin dioxide alternating layer stacking composite fiber has high electrochemical activity, high conductivity and high flexibility, achieves high specific capacity, high cycle stability and rate characteristics and excellent flexibility of lithium ion battery, and realizes precise control of the structure of the graphene composite fiber. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: preparation of graphene/tin dioxide alternating layer stacked composite fiber; and #usage of graphene/tin dioxide alternating layer stacked composite fiber as cathode of lithium ion battery.