Cr2O3 supported reduced graphene oxide lithium battery anode material and preparation method

Abstract

The invention discloses a preparation method of a Cr2O3 supported reduced graphene oxide lithium ion battery anode material. The preparation method comprises steps as follows: S101: preparing a graphene oxide solution and a chromium chloride hexahydrate solution; S102: adding the graphene oxide solution to the chromium chloride hexahydrate solution, and performing uniform ultrasonic mixing and drying to obtain a molten sample; S103: putting the sample in a porcelain boat, putting the porcelain boat in a tubular furnace, performing calcination and annealing under the inert gas, and naturally cooling a product to the room temperature to obtain a final product. The material takes chromium chloride hexahydrate as a precursor, the graphene oxide solution and the dissolved chromium chloride hexahydrate solution are mixed uniformly through ultrasonic treatment, the cathode material is prepared through calcination at the high temperature, the conductivity of the material is effectively increased through supporting of graphene, the volume expansion effect in the charge-discharge process is effectively relieved, and the lithium ion battery anode material with high specific capacity and longcyclic life is prepared. Raw materials are widely sourced, and the method is simple, controllable and easy to operate, uses simple equipment and causes little pollution.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and in particular relates to a negative electrode material of a redox graphene lithium battery loaded with dichromium trioxide and a preparation method thereof. Background technique [0002] With the rapid development of society, the challenges of environmental pollution and energy crisis are becoming increasingly severe, and green energy has become a research and development hotspot in countries all over the world. As a new type of clean rechargeable power source, lithium-ion batteries have the advantages of light weight, low pollution, high working voltage, high energy density, and long cycle life. They have shown broad application prospects in the fields of national defense, electric vehicles, and electronics. Known as the ideal power supply in the 21st century. In lithium-ion batteries, the negative electrode material is one of the important factors affecting the battery capacity and ser...

AI Technical Summary

Problems solved by technology

However, pure metal oxides face many problems in the application of lithium-ion batteries, such as volume expansion effect, larger volume during delithiation and lithium intercalation, poor conductivity, etc., which lead to poor cycle performance of batteries.

Images