Preparation method of carbon-coated graphite negative electrode material

Abstract

The invention discloses a preparation method of a carbon-coated graphite negative electrode material. The carbon-coated graphite negative electrode material comprises graphite, graphene, ionic liquid,epoxy resin, polyvinylidene fluoride, ethanol, a pickling mixed solution, benzenediol, a catalyst and an initiator, and the mass percentages of the components are as the follows: 15-25% of graphite,20-30% of graphene, 15-25% of ionic liquid, 10-20% of epoxy resin, 2-4% of polyvinylidene fluoride, 10-20% of ethanol, 1-3% of the pickling mixed solution, 5-10% of benzenediol, 0.5-1% of the catalystand 0.5-1% of the initiator. The preparation method comprises the following steps: step 1, selecting raw materials; step 2, oxidizing graphite; step 3, coating the graphite with carbon; step 4, carbonizing the graphite; step 5, carrying out cleaning and drying; and step 6, carrying out inspecting and storing. The preparation method has a simple and rigorous process, and can replace other expensive preparation process of carbon-coated graphite negative electrode materials, and the effect is obvious. Raw materials are cheap and have low cost, and processing is convenient, so that production cost is greatly saved, and processing and production are facilitated.

Description

technical field [0001] The invention relates to the technical field of graphite negative electrode materials, in particular to a preparation method of carbon-coated graphite negative electrode materials. Background technique [0002] The negative pole refers to the lower potential end of the power supply. In a primary battery, it refers to the electrode that acts as an oxidizer. It is written on the left in the battery reaction. From a physical point of view, it is the pole from which electrons flow out of the circuit. The negative electrode material refers to the raw material that constitutes the negative electrode in the battery. At present, the common negative electrode materials include carbon negative electrode materials, tin-based negative electrode materials, and graphite negative electrodes; traditional carbon-coated graphite negative electrode materials are complicated to prepare, cumbersome to operate, and graphite cannot be eliminated during preparation. Surface d...

AI Technical Summary

Problems solved by technology

The negative electrode material refers to the raw material that constitutes the negative electrode in the battery. At present, the common negative electrode materials include carbon negative electrode materials, tin-based negative electrode materials, and graphite negative electrodes; traditional carbon-coated graphite negative electrode materials are complicated to prepare, cumbersome to operate, and graphite cannot be eliminated during preparation. Defects and impurities on the surface are not conducive to the subsequent processing and production of graphite. At the same time, the single use of graphite as a carbon source cannot significantly improve the electrochemical performance of graphite, and the raw materials of traditional carbon-coated graphite anode materials are expensive, which is not conducive to saving production costs. ; Aiming at these defects, it is necessary to design a preparation method of carbon-coated graphite anode material

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