▎ 摘　　要

NOVELTY - A solid electrolyte comprises a discontinuous functionalized graphene quantum dot outer layer and a titanium aluminum lithium phosphate core, labeled as titanium aluminum lithium phosphate composite (I) doped functionalized graphene quantum dots. The preparation of solid electrolyte involves (i) dispersing lithium aluminum titanium phosphate in organic solvent (A), dispersing, adding activator and transfer to microwave reactor, turning on microwave and adjusting microwave power until reflux state, (ii) dispersing the functionalized graphene quantum dots in a organic solvent (B), adding lithium salt, and stirring to obtain a mixed solution, injecting the mixed solution into the lithium aluminum titanate phosphate dispersion liquid in the reflux state, (iii) ingesting the functional graphene quantum dots, reacting, cooling, filtering, washing and drying. USE - Solid electrolyte for lithium ion secondary battery used in consumer electronic product, energy storage system and power system. ADVANTAGE - The method is simple, green and environment-friendly, and provides high timeliness, provides solving scheme for industrial development application, and improves the ion conductivity and interface compatibility of the titanium aluminum phosphate lithium ion battery. The method ensures good ion conduction of anode and cathode active material and electrolyte interface, improving lithium ion secondary battery interface impedance is high, manufacturing difficult problem, and is simple. The energy consumption is low, the aging is high and it is easy for batch industrial production. The functionalized graphene quantum dot has a branched structure, by quantum effect and size effect, it greatly improves ionic conductivity of titanium aluminium phosphate lithium and enhances the compatibility of interface between solid electrolyte and active material; and has good flexibility, which is good for inhibiting electrode deterioration caused by electrode charging and discharging. DETAILED DESCRIPTION - A solid electrolyte comprises a discontinuous functionalized graphene quantum dot outer layer and a titanium aluminum lithium phosphate core, labeled as titanium aluminum lithium phosphate composite doped functionalized graphene quantum dots. The lithium aluminum titanium phosphate is of formula: Li1+xAlxTi2-x(PO4)3, where x is 0-1 (excluding 0). The preparation of solid electrolyte involves (i) dispersing lithium aluminum titanium phosphate in organic solvent (A), ultrasonically dispersing, adding a certain amount of activator and transfer to microwave reactor, turning on microwave and adjusting microwave power until reflux state, (ii) dispersing the functionalized graphene quantum dots in a organic solvent (B) according to a certain proportion, adding a certain proportion of lithium salt after ultrasonic dispersion, and stirring for 30 minutes to obtain a mixed solution, injecting the mixed solution into the lithium aluminum titanate phosphate dispersion liquid in the reflux state at a certain rate of intake, (iii) ingesting the functional graphene quantum dots, reacting for 60 minutes, and preparing the required materials by cooling, filtering, washing and drying. An INDEPENDENT CLAIM is included for preparation of solid electrolyte.