▎ 摘　　要

NOVELTY - Preparation of graphene-lithium titanate composite material comprises depositing lithium salt on surface of graphene film to obtain modified graphene film, placing modified film in titanium source solution, reacting at 60-80 degrees C for 1-6 hours to obtain graphene-lithium titanate precursor, and calcining precursor at 600-900 degrees C for 6-12 hours. USE - Method for preparing graphene-lithium titanate composite material used for preparing lithium-supplementing graphene-lithium titanate film for lithium battery (claimed). ADVANTAGE - The method has simple raw materials and easy operation, which strengthens binding force between graphene and lithium titanate to improve transmission rate of lithium ions. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for lithium-supplementing graphene-lithium titanate film prepared by assembling a cell using graphene-lithium titanate composite material as working electrode and lithium metal as counter electrode, and charging cell to deposit lithium on graphene-lithium titanate composite material surface.