A kind of preparation method of manganese trioxide porous micro-sheet/nickel foam composite electrode material

A technology of dimanganese trioxide and composite electrodes, which is applied in the field of preparation of inorganic non-metallic materials, can solve the problems of low electron transmission efficiency and low conductivity of manganese oxide, increase effective active sites, increase active surface, improve The effect of utilization

Inactive Publication Date: 2018-08-21
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The theoretical specific capacitance of manganese trioxide is high, but the conductivity of manganese oxide itself is very low, even as an electrode material, its electron transmission efficiency is not high

Method used

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  • A kind of preparation method of manganese trioxide porous micro-sheet/nickel foam composite electrode material
  • A kind of preparation method of manganese trioxide porous micro-sheet/nickel foam composite electrode material
  • A kind of preparation method of manganese trioxide porous micro-sheet/nickel foam composite electrode material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Immerse the clean nickel foam into 1.0 mol / L oxalic acid aqueous solution, and add dropwise 0.2 mol / L potassium permanganate aqueous solution to the oxalic acid aqueous solution at a temperature of 25°C and a stirring speed of 100 rpm. The dropping rate is 120 drops / min, and the final molar ratio of potassium permanganate and oxalic acid is 1:10. The stirring reaction time was 2 hours. After the reaction, the nickel foam was taken out for washing and put into an oven at a programmed temperature rise rate of 5°C / min, and dried at 100°C for 2 hours. Then put it into a muffle furnace for calcination, the calcination time is 2.5 hours, the calcination temperature is 350° C., and the heating rate is 10° C. / minute. After natural cooling, the manganese trioxide porous micro-sheet / foam nickel composite electrode material is obtained.

[0035] In terms of mass percentage, the product purity is not less than 99.96%, and the impurity content: carbon is less than 0.02%; nitrogen ...

Embodiment 2

[0037] Immerse the clean nickel foam into 1.0 mol / L oxalic acid aqueous solution, and add dropwise 0.2 mol / L potassium permanganate aqueous solution to the oxalic acid aqueous solution at a temperature of 25°C and a stirring speed of 120 rpm. The dropping rate is 180 drops / min, and the final molar ratio of potassium permanganate and oxalic acid is 1:10. The stirring reaction time was 3 hours. After the reaction, the nickel foam was taken out for washing and put into an oven at a programmed temperature rise rate of 5°C / min, and dried at 100°C for 2 hours. Then put it into a muffle furnace for calcination, the calcination time is 2.5 hours, the calcination temperature is 350° C., and the heating rate is 10° C. / minute. After natural cooling, the manganese trioxide porous micro-sheet / foam nickel composite electrode material is obtained.

[0038] In terms of mass percentage, the product purity is not less than 99.97%, and the impurity content: carbon is less than 0.02%; nitrogen is...

Embodiment 3

[0040] Immerse the clean nickel foam into 1.5 mol / L oxalic acid aqueous solution, and add dropwise 0.25 mol / L potassium permanganate aqueous solution to the oxalic acid aqueous solution at a temperature of 25°C and a stirring speed of 150 rpm. The dropping speed is 180 drops / min, and the final molar ratio of potassium permanganate and oxalic acid is 1:20. The stirring reaction time was 2 hours. After the reaction, the nickel foam was taken out for washing and put into an oven at a programmed temperature increase rate of 5°C / min, and dried at 100°C for 2 hours. Then put it in a muffle furnace for calcination, the calcination time is 2.5 hours, the calcination temperature is 350° C., and the heating rate is 10° C. / minute. After natural cooling, the manganese trioxide porous micro-sheet / foam nickel composite electrode material is obtained.

[0041] In terms of mass percentage, the product purity is not less than 99.96%, and the impurity content: carbon is less than 0.02%; nitro...

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Abstract

The invention belongs to the field of preparation of inorganic non-metallic materials, and in particular relates to a method for preparing a manganese trioxide porous micro-sheet / foamed nickel composite electrode material. Clean foamed nickel is immersed in an aqueous solution of oxalic acid, and stirred at room temperature. The above solution was added dropwise with potassium permanganate aqueous solution. Stirring and reacting until the microstructure precursor grows on the surface of the foamed nickel, taking out the foamed nickel, washing, drying and calcining in sequence to obtain the manganese trioxide porous micro-sheet / foamed nickel composite electrode material. The process of the invention is simple and easy, the product has high purity and low preparation cost. The thickness of the manganese trioxide micro-sheets is between 200-300 nm, the size of the micro-sheets is between 3-5 μm, the size of the nano-pores is between 10-30 nm, and the uniformity and dispersion of the product are very good , can be directly applied to supercapacitor electrode materials, and is easy to apply to actual mass production.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic materials, and in particular relates to a preparation method of manganese trioxide porous micron sheet / foam nickel composite electrode material. Background technique [0002] In recent years, with its high power density, fast charging and discharging speed, long service life and high safety and stability, supercapacitors have gradually become the most potential energy storage devices in the next generation of energy devices, which can meet the needs of modern electronic equipment for the development of the times. and energy systems. The supercapacitor characteristic of metal oxides is Faraday pseudocapacitance, mainly because redox reactions occur on the surface of metal oxide electrode materials and in two-dimensional or three-dimensional spaces in the bulk phase, and charges are adsorbed in the electrodes to generate high capacitance. The faradaic pseudocapacitance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/46
CPCY02E60/13
Inventor 张杰许家胜
Owner BOHAI UNIV
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