Fluoride nano composite material and preparation method thereof

The invention discloses a fluoride nano composite material and a preparation method thereof in the field of battery material preparation, a manganese source and a cobalt source are dissolved in deionized water, a reducing alcohol aqueous solution is added, and a bimetallic ion oxide precursor material is obtained through a hydrothermal reaction; dissolving sodium chloride, the bimetallic ion oxide precursor material and an organic carbon source in deionized water, freeze-drying, calcining in an inert atmosphere, completely washing the sodium chloride by using the deionized water, putting into a reaction container, carrying out fluorination reaction with fluorine source gas under a high-temperature condition, naturally cooling to room temperature, taking out, and drying to obtain the bimetallic ion oxide composite material. According to the method, synchronous compatibility improvement of a voltage platform, a conductive layer and active capacity of the carbon fluoride material is realized, a lithium ion migra