Copper-modified carbon fluoride/niobium oxide composite positive electrode material and preparation method thereof

The invention discloses a copper-modified carbon fluoride/niobium oxide composite positive electrode material and a preparation method thereof.The preparation method comprises the steps that firstly, niobium ethoxide, hydrogen peroxide and fluorinated ketjen black serve as raw materials, ethyl alcohol serves as a solvent, a fluorinated ketjen black/alpha-Nb2O5 composite positive electrode material is prepared through sol, drying and calcination, then copper sulfate serves as a raw material, water serves as a solvent, a surfactant is added, and the copper-modified carbon fluoride/niobium oxide composite positive electrode material is prepared through sol drying and calcination; and preparing the copper modified fluorinated ketjen black/alpha-Nb2O5 composite positive electrode material by adopting a water solvent method. The compounding of niobium pentoxide can improve the conductivity of the material and improve the voltage lag under high-rate discharge, the copper modification can improve the ionic conductivi