▎ 摘　　要

NOVELTY - Potassium titanium phosphate/carbon-redox graphene material, is claimed. The reduced graphene oxide is a monolithic layer with a size of 2-5 mu m, and a three-dimensional porous structure is formed by interpenetrating each other. The particle size of the potassium titanium phosphate particles is 40-150 nm and the surface is a 2-10 nm carbon coating layer. The carbon-coated potassium titanium phosphate nanoparticle is uniformly dispersed on the surface of the reduced graphene oxide sheet. USE - The potassium titanium phosphate/carbon-redox graphene material is useful as cathode material in potassium ion battery (claimed). ADVANTAGE - The carbon material and the redox graphene material increases the conductivity of the composite material and buffers the volume expansion generated during the charging and discharging process, and ensures graphene material exhibits excellent rate and cycle performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for: a method for preparing potassium titanium phosphate/carbon-redox graphene material, comprising (i) dispersing potassium titanium phosphate into an aqueous solution, adding buffer material and carbon-coated raw material, stirring, collecting and drying; (ii) dispersing the coated potassium titanium phosphate prepared in an aqueous solution again, and adding graphene oxide solution to obtain a mixed solution; and (iii) subjecting mixed solution to hydrothermal treatment, collecting, drying and carbonizing at a high temperature.