▎ 摘　　要

NOVELTY - Preparing lithium battery cathode material of energy-efficient lithium battery involves using lithium solution, dissolving lithium compound in de-ionized water to prepare solution, preparing graphene dispersion liquid by action of ultrasonic device, dispersing graphene-containing in de-ionized water followed by hydro-thermal reaction to obtain solution with stirring and placing solution into reaction kettle. The atomic ratio of lithium, iron and phosphorus is 2:1:1. USE - Method for preparing lithium battery cathode material of energy-efficient lithium battery used in high-pressure cleaning machine. ADVANTAGE - The method enables to prepare lithium battery cathode material of energy-efficient lithium battery realizes combination of metal oxide and graphene sheet, improves stability of lithium battery cathode and performance of battery, shortens transmission path for electrons, and increases conductivity of lithium battery. DETAILED DESCRIPTION - Preparing lithium battery cathode material of energy-efficient lithium battery involves using lithium solution, dissolving lithium compound in de-ionized water to prepare solution, preparing graphene dispersion liquid by action of ultrasonic device, dispersing graphene-containing in de-ionized water followed by hydro-thermal reaction to obtain solution with stirring and placing solution into reaction kettle. The atomic ratio of lithium, iron and phosphorus is 2:1:1. The ferrous salt and phosphoric acid are added, stirred, filtered, washed and dried to obtain lithium iron phosphate-graphene composite material. The bonding agent are added into composite material whose diameter is 1-10 micron. The lithium battery anode material and composite material particles are granulated into mixing powder by action of mixing process. The adhesive is mixed into mixing powder, homogenized and dried by performing high temperature vacuum treatment at 180-220 degrees C to prepare lithium iron phosphate lithium battery anode. The lithium battery cathode material is prepared by taking metal oxide and adding acidic aqueous solution containing tin salt, stirring, filtering liquid, taking out fixing material inside, rinsing with water into graphene suspension, stirring material after passing through centrifuge then drying centrifugal substrate to obtain lithium battery cathode material.