Carbon material-loading manganese dioxide nanowire array composite and method for producing same

Abstract

The invention provides a carbon material-loading manganese dioxide nanowire array composite and a method for producing the same, and relates to a manganese dioxide nanocomposite and a method for producing the same. According to the invention, the material consists of a carbon material and manganese dioxide; and the method comprises the steps that the carbon material, potassium permanganate and sulfuric acid are taken as raw materials, and after simple technologies of mixing, stirring, oxidation-reduction reaction, solid-liquid separation, washing and drying, the product is obtained. The method is simple, is convenient to operate, is environment-friendly, consumes less energy, and is low in production cost and convenient to popularize and apply; and the product which is produced through the method has the characteristics of high conductivity, high specific surface area, high proton diffusion coefficient, quick charging and discharging capability, excellent electrochemical performance and the like. The method can be widely used for producing manganese dioxide nanocomposite, the product which is produced by adopting the method can be widely applied in lithium ion batteries, solar cells, supercapacitors and other new energy devices, and is particularly suitable for being used as electric and heat conduction materials, catalyst carriers, sensors and other materials.

Description

technical field [0001] The invention belongs to the technical field of functional composite materials, and in particular relates to a manganese dioxide composite material and a preparation method thereof. Background technique [0002] Manganese dioxide is rich in resources, low in price, friendly to the environment, and has a special structure, so it has become a research hotspot for scientists. However, since manganese dioxide is a semiconductor oxide, its conductivity is poor, and the active material of a supercapacitor requires good conductivity, and the internal resistance of the electrode should be as small as possible to ensure that it can perform high-current charging and discharging. Therefore, when manganese dioxide is used as the capacitor active material, it must be compounded with other materials. Carbon materials are known for their low price, excellent electrical conductivity, and physical and chemical stability. The combination of manganese dioxide and carbon...

AI Technical Summary

Problems solved by technology

The main disadvantages of this patent are: (1) in the manganese dioxide composite material obtained, the manganese dioxide is a porous network structure, although porous, the pores are irregular, and the solution ions easily enter the inside of the active material, but they cannot enter quickly. The charge and discharge capacity is limited, thereby affecting its electrochemical high current charge and discharge performance; (2) in the preparation method, after potassium permanganate is added to the graphene suspension, it is only heated without stirring, so that the reaction temperature is not uniform, The deposition of manganese dioxide on graphene is also uneven, the yield of the composite material produced is too low, and the manganese dioxide particles are easy to agglomerate, which is not conducive to industrial production

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