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Preparation method of manganese (III) oxide porous micro-sheet/foamed nickel combined electrode material

A technology of manganese trioxide and composite electrodes, which is applied in the field of preparation of inorganic non-metallic materials, can solve the problems of low conductivity of manganese oxide and low electron transmission efficiency, and achieve the purpose of increasing active surface, increasing effective active sites, and enriching voids Effect

Inactive Publication Date: 2016-02-24
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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  • Preparation method of manganese (III) oxide porous micro-sheet/foamed nickel combined electrode material
  • Preparation method of manganese (III) oxide porous micro-sheet/foamed nickel combined electrode material
  • Preparation method of manganese (III) oxide porous micro-sheet/foamed nickel combined electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Immerse the clean nickel foam into 1.0mol / L oxalic acid aqueous solution, and add dropwise 0.2mol / 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 and washed, then put into an oven with 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.

[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%; nitrog...

Embodiment 2

[0037] Immerse the clean nickel foam into 1.0mol / L oxalic acid aqueous solution, and add dropwise 0.2mol / 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 and washed, then put into an oven with 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.

[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%; nitroge...

Embodiment 3

[0040] Immerse the clean nickel foam into 1.5mol / L oxalic acid aqueous solution, and add dropwise 0.25mol / 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 and washed, then put into an oven with 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%; nitr...

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Abstract

The invention belongs to the preparation field of inorganic non-metallic materials, and especially relates to a preparation method of a manganese (III) oxide porous micro-sheet / foamed nickel combined electrode material. The method comprises the steps: immersing clean foamed nickel into an oxalic acid aqueous solution, adding a potassium permanganate aqueous solution drop by drop into the above solution at a room temperature and in a stirring condition, conducting stirring reaction until a micro-structure precursor grows on the surface of the foamed nickel, taking out the foamed nickel, conducting cleaning, drying and calcining in sequence, and finally obtaining a manganese (III) oxide porous micro-sheet / foamed nickel combined electrode material. The preparation method is simple and convenient, is low in manufacture cost, and produces products that have high purity. A manganese (III) oxide micro-sheet is 200-300nm in thickness and 3-5[Mu]m in dimension. The dimension of a nano-scale porous channel is 10-30nm. Products have great uniformity and dispersibility, can be directly applied to super-capacitor electrode materials, and can be easily applied to actual large-scale 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 Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/46
CPCY02E60/13H01G11/86H01G11/24H01G11/30H01G11/46
Inventor 张杰许家胜
Owner BOHAI UNIV
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