Application of graphene/lithium titanate composite

Tetrabutyl titanate, graphene, P123 and tertiary butanol are prepared into a titanium source dispersion liquid, lithium acetate dehydrate, deionized water and tertiary butanol are prepared into a lithium source solution, the mixed titanium source dispersion liquid is transferred into a microwave reactor and heated until flows back, the lithium source solution is added, cooling is carried out after the mixture reacts for certain period of time, solvents are removed, and then drying is carried out to obtain a graphene-based lithium titanate precursor. The obtained graphene-based lithium titanate precursor is placed in a tube furnace and roasted at a certain temperature for certain period of time under inertia gas protection to obtain the graphene/lithium titanate composite. An obtained active material, acetylene black and PVDF are uniformly mixed and coated on an aluminum foil to prepare a button cell electrode plate, a half-cell is finally assembled in a glovebox, the charging-discharging performance of the half-cell is tested, the active material is made into another half-cell, and the performance of the half-cell is detected. Detection shows that the capacity of graphene/lithium titanate is still 140mAh/g under 1C multiplying power, can still be kept for more than 99% after being cycled for 1000 times, and has excellent performance.