▎ 摘　　要

NOVELTY - Preparing metal fluorine salt modified lead bromide cesium base material/carbon composite electrode material comprises taking cesium lead bromide base material, metal fluorine salt and carbon material as initial raw material, firstly, mixing cesium lead bromide base material with metal fluorine salt, heat treatment, and mixing with carbon material and low melting point fluorine salt, and carrying out heat treatment, to obtain metal fluorine salt modified cesium lead bromide base material/carbon composite electrode material, the cesium lead bromide base material is lead bromide cesium or mixture mainly containing cesium lead bromide, the metal fluorine salt is lithium fluoride, sodium fluoride, potassium fluoride, calcium fluoride, magnesium fluoride, strontium fluoride, barium fluoride, ferrous fluoride and low melting point fluorine salt and low melting pointfluorine salt, the low melting point fluorine salt is stannous fluoride, germanium fluoride and antimony fluoride. USE - The material is useful in battery field. ADVANTAGE - The material has good electrochemical performance, and has good application prospect in the battery field. DETAILED DESCRIPTION - Preparing metal fluorine salt modified lead bromide cesium base material/carbon composite electrode material comprises taking cesium lead bromide base material, metal fluorine salt and carbon material as initial raw material, firstly, mixing cesium lead bromide base material with metal fluorine salt, heat treatment, and mixing with carbon material and low melting point fluorine salt, and carrying out heat treatment, to obtain metal fluorine salt modified cesium lead bromide base material/carbon composite electrode material, the cesium lead bromide base material is lead bromide cesium or mixture mainly containing cesium lead bromide, the metal fluorine salt is lithium fluoride, sodium fluoride, potassium fluoride, calcium fluoride, magnesium fluoride, strontium fluoride, barium fluoride, ferrous fluoride and low melting point fluorine salt and low melting pointfluorine salt, the low melting point fluorine salt is stannous fluoride, germanium fluoride and antimony fluoride, the metal fluorine salt is 0.0001-0.3 mol ratio of cesium lead bromide, the carbon material is graphite with large aperture, graphene, mesoporous carbon, and microsphere carbon, where the preparation method of metal fluorine salt modified cesium lead bromide-based material/carbon composite electrodematerial comprising, (1) weighing lead bromide cesium lead bromide, metal fluorine salt, mixing and stirring, (2) heating the product in the step (1) to 250-8000 degrees C for 2-10 hours, protecting the product in argon atmosphere and keeping the temperature for 2-10 hours, cooling to normal temperature, (3) mixing and stirring the product in step (2) with carbon, the mol ratio of carbon to cesium lead bromide base material is 0.2-2, (4) mixing the product in the step (3) with a certain mass of low-melting-point fluorine salt, raising the temperature to 250-6000 degrees C, carrying out argon atmosphere protection for 5-50 hours, cooling to normal temperature to obtain the product.