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Preparation method for graphene like cobaltosic oxide nano film material and application of electrode slice

A technology of cobalt tetroxide nanometer and graphene, applied in cobalt oxide/cobalt hydroxide, nanotechnology, nanotechnology and other directions

Inactive Publication Date: 2015-09-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no relevant report on this kind of graphene-like cobalt trioxide nano-film material at home and abroad.

Method used

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  • Preparation method for graphene like cobaltosic oxide nano film material and application of electrode slice

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Cobalt acetate and sodium acetate were mixed with deionized water to prepare 250g / L cobalt acetate solution and 180g / L sodium acetate solution. Take one liter of each of the two solutions and put them in a constant temperature water bath at 45°C for 5 minutes, then pour 200 mL of 28% ammonia solution per liter of solution into the above mixed solution, stir evenly, and obtain a sodium salt Cobalt-ammonia complex solution, and then pour 120 mL of hydrogen peroxide per liter of solution into the mixed solution, and transfer the solution to a hydrothermal device for treatment. The temperature is set to 120°C and the duration is 16 hours. After the reaction is completed, the obtained black precipitate is washed and centrifuged three times with deionized water and absolute ethanol, and dried in an air drying oven for 10 hours to obtain the cobalt tetroxide product.

[0030] The product is uniformly mixed with acetylene black and PTFE binder in a mass ratio of 75:10:15, and the ...

Embodiment 2

[0032] Cobalt nitrate and sodium nitrate were mixed with deionized water to form a 320g / L cobalt nitrate solution and a 240g / L sodium nitrate solution. Take one liter of each of the two solutions and put them in a constant temperature water bath at 65°C for 8 minutes at the same time, then pour 300mL of 28% ammonia solution per liter of solution into the above mixed solution, stir evenly, and obtain a sodium salt Cobalt-ammonia complex solution, and then 180mL of hydrogen peroxide per liter of solution is poured into the mixed solution, the solution is transferred to a hydrothermal device for treatment, the temperature is set to 150°C, and the duration is 12 hours. After the reaction is completed, the obtained black precipitate was washed and centrifuged three times with deionized water and absolute ethanol, and dried in an air drying oven for 8 hours to obtain a graphene-like cobalt tetraoxide nano-film with a size area of ​​about 30μm×30μm and a thickness of about It is 2.9nm...

Embodiment 3

[0035] Cobalt acetate and sodium acetate were mixed with deionized water to prepare a 400g / L cobalt nitrate solution and a 300g / L sodium acetate solution. Take one liter of each of the two solutions and put them in a constant temperature water bath at 55°C for 10 minutes, then pour 400mL of 28% ammonia solution per liter of solution into the above mixed solution, stir evenly, and obtain a sodium salt Cobalt-ammonia complex solution, and then pour 250 mL of hydrogen peroxide per liter of solution into the mixed solution, transfer the solution to a hydrothermal device for treatment, and set the temperature to 120°C and the duration of 18 hours. After the reaction is completed, the obtained black precipitate is washed and centrifuged three times with deionized water and absolute ethanol, and dried in an air drying oven for 8 hours to obtain the cobalt tetroxide product.

[0036] The product is uniformly mixed with acetylene black and PTFE binder in a mass ratio of 75:10:15, and the ...

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Abstract

The invention relates to a preparation method for a graphene like cobaltosic oxide nano film material and an application of an electrode slice. A cobalt salt and a sodium salt are respectively weighed and are dissolved in deionized water, and then a cobalt salt solution and a sodium salt solution are obtained; equal volume of the cobalt salt solution and the sodium salt solution are taken to be mixed, perform thermostatic water bath and be stirred uniformly, and then a mixed solution is obtained; ammonium water is added to the mixed solution, and then a cobalt ammonia coordination compound solution containing the sodium salt is obtained; hydrogen peroxide is dipped into the cobalt ammonia coordination compound solution then, hydro-thermal treatment is performed on the obtained mixed solution under sealing, and a black precipitate is obtained; and the black precipitate is washed successively via the deionized water and absolute ethyl alcohol and is dried under air atmosphere, and a graphene like cobaltosic oxide nano film is obtained. The graphene like cobaltosic oxide nano film is mixed with a conductive agent and a binder, and a slurry is obtained after stirring; and the slurry is uniformly coated on foam nickel after pretreatment in a scraping manner, and the electrode slice is obtained through drying and tablet compressing. An equipment condition needed by the preparation method is simpler, operation is convenient, preparation cost is low, and the preparation method is suitable for factory large-scale production.

Description

Technical field [0001] The invention relates to a preparation method of a super capacitor electrode material, in particular to a preparation method of a graphene-like cobalt tetroxide nano film material and an application of preparing electrode sheets. Background technique [0002] Supercapacitors are a new type of charge storage device with higher power density than secondary batteries and higher energy density than traditional capacitors. Compared with secondary batteries, they also have better cycle reversibility and longer cycle periods. Therefore, they have been widely used in many fields such as mobile electronic equipment, backup power supplies and hybrid vehicles. The working principle of supercapacitors is essentially divided into Faraday reaction energy storage and non-Faraday energy storage. The Faraday capacitance mainly comes from the charge distributed on the electrode / electrolyte interface, while the Faraday pseudocapacitance comes from the reversible redox react...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/86B82Y30/00B82Y40/00C01G51/04
CPCY02E60/13H01G11/46B82Y30/00B82Y40/00C01G51/04H01G11/36H01G11/86
Inventor 邓意达冯超胡文彬钟澄
Owner TIANJIN UNIV
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