Preparation method for copper fluoride/molybdenum trioxide/graphene composite material and method for preparing electrode from copper fluoride/molybdenum trioxide/graphene composite material

Abstract

The invention relates to a preparation method for a copper fluoride / molybdenum trioxide / graphene composite material and a method for preparing an electrode from the copper fluoride / molybdenum trioxide / graphene composite material. Graphene and a CuF2 / MoO3 composite material are put into an agate ball milling tank, and ball milling beads are put into the tank; the ball milling tank is put in a closed stainless steel outer lining ball milling tank; a die is filled with inert protective gas; ball milling is performed on a planet ball mill to obtain copper fluoride / molybdenum trioxide / graphene composite material powder; the composite material powder is mixed with acetylene black and polyvinylidene fluoride at a mass ratio of 8:1:1; NMP is added in a dropwise manner to enable the mixture to be formed into uniform paste, and a stainless steel thin film is uniformly coated with the uniform paste; a stainless steel sheet is dried at a temperature of 60-80 DEG C in a vacuum environment for 20-24h; and then the stainless steel sheet is cut into a battery-like shape. According to the preparation method, a special reaction instrument is not required, so that the preparation cost is low; compared with a battery prepared from the fluoride / molybdenum trioxide composite material without graphene, the rate capacity and capacity of the battery prepared from the copper fluoride / molybdenum trioxide / graphene composite material are greatly improved.

Description

technical field [0001] The invention relates to a copper fluoride / molybdenum trioxide / graphene composite material and a method for preparing an electrode. Specifically, graphene is used as a conductive additive and copper fluoride / molybdenum trioxide is compounded by a high-energy ball milling method by a ball milling method and applied in a lithium primary battery, which belongs to the technical field of energy storage materials. Background technique [0002] As an energy storage device, lithium battery has the characteristics of high working voltage, large specific energy, long cycle life, good safety, small self-discharge, wide operating temperature range and fast charging and discharging. At present, lithium-ion batteries have been widely used in fields such as electric vehicles, electrical equipment, and backup power supplies. However, the energy density of lithium batteries, especially the volumetric energy density, cannot fully meet the current market demand. Under t...

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Problems solved by technology

However, at present, CuF 2 -The research on Li is very limited, and its discharge performance is tested at a small rate, because CuF 2 The conductivity is extremely low and has significant ionic bond characteristics, so CuF 2 Although it has a high theoretical specific capacity and discharge voltage, it cannot be directly applied as a positive electrode material in lithium-ion batteries.

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