Preparation method of hollow cobaltosic oxide microball materials and application for manufacturing electrodes

A technology of cobalt tetroxide microspheres and cobalt tetroxide, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of increasing process complexity, product shape damage, and increasing costs, and achieve uniform size and good shape , the effect of convenient operation

Inactive Publication Date: 2015-07-22
TIANJIN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

At present, the commonly used hydrothermal method to prepare the hollow structure of cobalt tetroxide often needs to add a hard template. After the reaction, the template and the final product need to be separated. The operation is very troublesome, and the morphology of the product is often damaged.
At the same time, the post-calcination oxidation treatment is also essential, which increases the complexity of the process and increases the cost

Method used

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  • Preparation method of hollow cobaltosic oxide microball materials and application for manufacturing electrodes

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Experimental program
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Embodiment 1

[0029] Cobalt acetate and sodium acetate were made into 50g / L cobalt acetate solution and 60g / L sodium acetate solution with deionized water respectively. Take one liter of each of the two solutions, put them into a constant temperature water bath at 45°C and add them for 5 minutes, then take 50mL of 28% ammonia solution per liter of solution and pour them into the above mixed solution, stir evenly to obtain The cobalt-ammonia complex solution, and then pour 30mL of hydrogen peroxide per liter into the mixed solution, transfer the solution to a hydrothermal device for treatment, and set the temperature at 110°C for 9 hours. After the reaction was completed, the obtained black precipitate was washed and centrifuged three times with deionized water and absolute ethanol respectively, and dried in an air drying oven for 10 hours to obtain the tricobalt tetroxide product.

[0030] Evenly mix the product with acetylene black and PTFE binder at a mass ratio of 75:10:15, coat the mixe...

Embodiment 2

[0032] Cobalt nitrate and sodium nitrate were made into 120g / L cobalt nitrate solution and 100g / L sodium nitrate solution with deionized water respectively. Take one liter of each of the two solutions, put them into a constant temperature water bath at 50°C and add them for 8 minutes, then take 100mL of 28% ammonia solution per liter of solution and pour them into the above mixed solution, and stir evenly to obtain sodium salt-containing Cobalt ammonium complex solution, and then pour 60mL of hydrogen peroxide into the mixed solution per liter of solution, transfer the solution to a hydrothermal device for treatment, set the temperature at 120°C for 10 hours. After the reaction was completed, the obtained black precipitate was washed and centrifuged three times with deionized water and absolute ethanol respectively, and dried in an air drying oven for 8 hours to obtain hollow cobalt trioxide microspheres with a diameter of 500 nm and a thin wall thickness of about 50nm.

[00...

Embodiment 3

[0035] Cobalt nitrate and sodium nitrate were made into 200g / L cobalt nitrate solution and 150g / L sodium nitrate solution with deionized water respectively. Take one liter of each of the two solutions, put them into a constant temperature water bath at 50°C and add them for 10 minutes, then take 150mL of 28% ammonia solution per liter of solution and pour them into the above mixed solution, and stir evenly to obtain sodium salt-containing Cobalt ammonium complex solution, and then pour 90mL of hydrogen peroxide into the mixed solution per liter of solution, transfer the solution to a hydrothermal device for treatment, set the temperature at 160°C for 12 hours. After the reaction was completed, the obtained black precipitate was washed and centrifuged three times with deionized water and absolute ethanol respectively, and dried in an air drying oven for 8 hours to obtain the tricobalt tetroxide product.

[0036] Evenly mix the product with acetylene black and PTFE binder at a m...

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Abstract

The invention relates to a preparation method of hollow cobaltosic oxide microball materials and application for manufacturing electrodes. The preparation method includes weighing cobalt salt and sodium salt respectively and dissolving them in deionized water to obtain cobalt salt solution and sodium salt solution; mixing the cobalt salt solution and the sodium salt solution in equal volume and stirring uniformly in thermostatic water bath to obtain mixed solution; adding ammonia water in the mixed solution to obtain cobalt ammonia complex solution containing the sodium salt; dripping hydrogen peroxide to obtain the mixed solution, subjecting the mixed solution to hydro-thermal treatment hermetically to obtain black precipitates; washing the black precipitates by deionized water and absolute ethyl alcohol sequentially to obtain hollow cobaltosic oxide microballs. The cobaltosic oxide microballs are mixed with conductive agent and adhesive and stirred to obtain sizing; the sizing is uniformly coated on foam nickel after pretreatment, dried and pressed to obtain electrodes. The required equipment for the preparation method is simple, and the preparation method is convenient to operate, low in preparation method and applicable to industrial massive production.

Description

technical field [0001] The invention relates to a preparation method of a supercapacitor electrode material, in particular to a preparation method of a hollow cobalt trioxide microsphere material and an application of the prepared electrode sheet. Background technique [0002] So far, materials researchers have prepared a series of nanoparticles with various shapes by using different synthesis processes. In recent years, people have turned their attention to the research on the assembly of one-dimensional nanostructure points into two-dimensional and three-dimensional ordered superstructures or composite functional structures, which is the key to the practical application of nano-functional devices. step. However, in addition to ordinary one-dimensional, two-dimensional and three-dimensional structures, structures with large internal spaces and high specific surface areas are also another challenge for the development of new functional materials, because hollow structures a...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/46H01G11/42H01G11/30
CPCY02E60/13H01G11/86H01G11/30H01G11/42H01G11/46
Inventor 邓意达冯超胡文彬钟澄
Owner TIANJIN UNIV
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