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Method for preparing porous spherical manganese oxide/carbon compound

A carbon composite and manganese oxide technology, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of less porous spherical manganese oxide/carbon composite and poor conductivity, and achieve the effects of short cycle, simple and mild method, and simple equipment process.

Inactive Publication Date: 2019-04-19
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Manganese dioxide has a high specific capacitance and is an important electrode material for electrochemical supercapacitors, but as a metal oxide, its conductivity is relatively poor
However, there are few reports on the preparation of porous spherical manganese oxide / carbon composites.

Method used

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  • Method for preparing porous spherical manganese oxide/carbon compound
  • Method for preparing porous spherical manganese oxide/carbon compound

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Preparation of m-aminophenol formaldehyde resin balls: add 2.0 grams of 25% ammoniacal liquor to a 30-degree solution containing 24 grams of deionized water and 10 milliliters of absolute ethanol, add 0.71 grams of m-aminophenol, stir and dissolve, then Add 1.0 g of 35% formaldehyde solution, continue to stir for 24 hours, and centrifuge; dry the sample in an oven at 50 degrees for 12 hours; disperse 0.5 g of m-aminophenol formaldehyde resin balls into 20 ml of water, add 15 ml of 0.5mol.L -1 Manganese acetate; In this way, the mass ratio of the volume of the manganese oxide precursor solution to the m-aminophenol formaldehyde resin is 30:1, and it is taken out after stirring for 24 hours.

[0025] (2) Put it in a 40-degree oven, let it stand for 24 hours, and then take it out.

[0026] (3) Put it in a tube furnace for carbonization at 600 degrees under a nitrogen atmosphere, and after cooling, obtain a porous spherical manganese oxide / carbon composite material.

...

Embodiment 2

[0029] (1) Preparation of m-aminophenol formaldehyde resin balls: add 2.0 grams of 25% ammoniacal liquor to a 30-degree solution containing 24 grams of deionized water and 10 milliliters of absolute ethanol, add 0.71 grams of m-aminophenol, stir and dissolve, then Add 1.0 g of 35% formaldehyde solution, continue to stir for 24 hours, and centrifuge; dry the sample in an oven at 50 degrees for 12 hours; disperse 1.0 g of m-aminophenol formaldehyde resin balls into 20 ml of water, add 10 ml of 1.0mol.L -1 Manganese chloride solution; like this, the mass ratio of the volume of the manganese oxide precursor solution to the m-aminophenol formaldehyde resin is 10:1, and it is taken out after stirring for 24 hours.

[0030] (2) Put it in a 100-degree oven, let it stand for 12 hours, and then take it out.

[0031] (3) Put it into a tube furnace and carbonize it at 800 degrees under a nitrogen atmosphere to obtain a porous spherical manganese oxide / carbon composite material.

[0032] ...

Embodiment 3

[0034] (1) Preparation of m-aminophenol formaldehyde resin balls: add 2.0 grams of 25% ammoniacal liquor to a 30-degree solution containing 24 grams of deionized water and 10 milliliters of absolute ethanol, add 0.71 grams of m-aminophenol, stir and dissolve, then Add 1.0 g of 35% formaldehyde solution, continue to stir for 24 hours, and centrifuge; dry the sample in an oven at 50 degrees for 12 hours; disperse 1.5 g of m-aminophenol formaldehyde resin balls into 20 ml of water, add 30 ml of 1.5mol.L -1 Manganese acetate solution; like this, the mass ratio of the volume of the manganese oxide precursor solution to the m-aminophenol formaldehyde resin is 20:1, and it is taken out after stirring for 24 hours.

[0035] (2) Put it in an oven at 40-200 degrees, let it stand for 2 hours, and then take it out.

[0036] (3) Put it into a tube furnace and carbonize it at 750 degrees under nitrogen atmosphere to obtain a porous spherical manganese oxide / carbon composite material.

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Abstract

The invention relates to a method for preparing a porous spherical manganese oxide / carbon compound. The method comprises the steps of: 1) adding a manganese oxide precursor of a certain concentrationinto a dispersion liquid of m-aminophenol formaldehyde resin spheres, stirring the mixture for several hours and then carrying out centrifugal separation on the mixture to obtain a m-aminophenol formaldehyde resin sphere / manganese oxide precursor compound; 2) placing the m-aminophenol formaldehyde resin sphere / manganese oxide precursor compound obtained in the step 1) into an oven, allowing it tostand for a period of time and then carrying out heat treatment thereon; 3) subjecting the m-aminophenol formaldehyde resin sphere / manganese oxide precursor compound after heat treatment to high temperature carbonization in a nitrogen atmosphere to obtain the porous spherical manganese oxide / carbon compound. Compared with the prior art, the method is simple and mild, the content of manganese oxidein the compound and the size of pores in the compound can be adjusted by changing the concentration of the manganese precursor, the equipment and process are simple, the cost is low, the cycle is short, and the yield is high.

Description

[technical field] [0001] The invention belongs to the technical field of material preparation, in particular to a method for preparing porous spherical manganese oxide / carbon composite. [Background technique] [0002] Supercapacitors, also known as electrochemical capacitors, mainly rely on electric double layers and redox pseudocapacitance (Faraday pseudocapacitance) to store electrical energy. A supercapacitor is an energy storage device between conventional capacitors and secondary batteries. It has the advantages of high power density of capacitors and high energy density of secondary batteries. It has high power density, fast charge and discharge speed, environmental friendliness, and long cycle life. , good reversibility, wide operating temperature range, high safety and low cost. [0003] Manganese dioxide has a high specific capacitance and is an important electrode material for electrochemical supercapacitors, but as a metal oxide, its conductivity is relatively po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/32H01G11/46
CPCH01G11/24H01G11/30H01G11/32H01G11/46Y02E60/13
Inventor 沈绍典包坤铭毛东森
Owner SHANGHAI INST OF TECH
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