Preparation method and application of cobalt sulfur compound

A cobalt-sulfur compound and reaction technology, applied in cobalt compounds, chemical instruments and methods, cobalt sulfide, etc., can solve problems such as difficult application of energy storage systems, easy agglomeration of materials, and poor cycle performance of materials

Active Publication Date: 2015-10-21
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, in the energy storage system—as the electrode active material of lithium-ion batteries, although nano-scale materials are easy to shuttle lithium ions between particles to improve the rate perf

Method used

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  • Preparation method and application of cobalt sulfur compound
  • Preparation method and application of cobalt sulfur compound
  • Preparation method and application of cobalt sulfur compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Material preparation:

[0066] Add 1g of cobalt chloride and 2g of urea to a mixed solution of 80mL of deionized water and glycerol at a mass ratio of 1:2, stir for a period of time until the solution is clear, transfer the mixed solution to a polytetrafluoroethylene lining, The inner lining is placed in a high-pressure reaction kettle, and the temperature is naturally raised to 120°C in a blast oven, and reacted for 12 hours. After it is lowered to room temperature, it is taken out for multiple filtration and washing. The washed product is dried in a vacuum oven at 40-60°C for 12-24 hours.

[0067] Put 1 g of the sample obtained in the above process in a muffle furnace for calcination at 500°C for 3 hours, then place it under a reducing atmosphere, add 1.5 g of sulfur source, and heat at 350°C for 6 hours to obtain the cobalt-sulfur compound with a specific shape .

[0068] Material Characterization:

[0069] The morphology of the material was analyzed by a scanning...

Embodiment 2

[0074] Material preparation:

[0075] Add 1g of cobalt chloride and 8g of urea to a mixed solution of 80mL of deionized water and glycerol according to the mass ratio of 1:8, stir for a period of time until the solution is clear, and transfer the mixed solution to a polytetrafluoroethylene lining, The inner lining is placed in a high-pressure reaction kettle, and the temperature is naturally raised to 120°C in a blast oven, and reacted for 12 hours. After it is lowered to room temperature, it is taken out for multiple filtration and washing. The washed product is dried in a vacuum oven at 40-60°C for 12-24 hours. Put 1g of the sample obtained in the above process into a muffle furnace for calcination at 400°C for 3 hours, then put it under a reducing atmosphere, add 1.5g of sulfur source, and heat at 350°C for 6h to obtain the cobalt-sulfur with specific morphology compound.

[0076] Material Characterization:

[0077] The morphology of the material was analyzed by a scanni...

Embodiment 3

[0082] Material preparation:

[0083] Dissolve a certain amount of cobalt salt, urea, and triethanolamine in a certain amount of deionized water to prepare solutions with concentrations of 25, 30, and 20 mg / mL, stir for a period of time until the solution is clear, and transfer the liquid to polytetrafluoroethylene Lining, the lining is placed in a high-pressure reaction kettle, and the temperature is naturally raised to 160°C in a blast oven, and reacted for 12 hours. After it is lowered to room temperature, it is taken out for multiple filtration and washing. The washed product is dried in a vacuum oven at 40-60°C for 12-24 hours.

[0084] Place the sample obtained in the above process in a muffle furnace for 6 hours at 600°C to calcinate to obtain cobalt oxide, then place 1 g of cobalt oxide in a reducing atmosphere, add 2 g of thiourea, and react at 350°C for 6 hours to obtain the Specific morphology of cobalt sulfur compounds.

[0085] Material Characterization:

[008...

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Abstract

Relating to cobalt sulfur compounds, the invention provides a preparation method and application of a cobalt sulfur compound. The method includes: dissolving a water soluble cobalt source and urea in a mixed solvent to form a solution, carrying out reaction to obtain cobalt carbonate, performing calcinations to obtain a cobalt oxide, and reacting the cobalt oxide with a sulfur source in a reducing atmosphere to obtain a micrometer-scale cobalt sulfur compound. The micrometer-scale cobalt sulfur compound can be spherical cobalt sulfur compound or lamellar square-like cobalt sulfur compound, and the obtained cobalt sulfur compound can be Co9S8, CoS, Co3S4 and CoS2, etc. The cobalt sulfur compound prepared by the preparation method provided by the invention can be applied as an electrode active material in preparation of secondary battery electrodes. According to the invention, specific shape cobalt sulfide can be prepared, is low in synthesis cost and has high tap density, and can be applied to secondary battery electrode materials, optical parametric oscillators, semiconductor materials, solar cells and other aspects.

Description

technical field [0001] The invention relates to cobalt sulfur compounds, in particular to a preparation method and application of cobalt sulfur compounds. Background technique [0002] Cobalt sulfur compounds, compared with titanium-based materials with similar discharge platforms (ACS applied materials&interfaces 2014, 6(10), 7895-7901.), have lower discharge platforms, higher specific capacity and higher specific energy. The electrode material of the secondary battery is more advantageous. Cobalt sulfur compounds include Co 9 S 8 、CoS 2 、Co 3 S 4 , CoS, etc. At present, the synthesized cobalt-sulfur compounds have many morphologies, such as dandelion-like Co 9 S 8 (ACS Appl.Mater.Interfaces 4(6):2999-3006.) and nanotubular Co 9 S 8 (CrystEngComm 12(6):1899-1904.), polyhedral CoS 2 (ACS Appl Mater Interfaces 4(8):4246-4250.) and lamellar spherical Co 3 S 4 (CrystEngComm 15(25):5087-5092.) and so on. The methods reported above can usually only prepare cobalt-su...

Claims

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Application Information

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IPC IPC(8): H01M4/58C01G51/00
CPCC01G51/30H01M4/5815H01M10/0525Y02E60/10
Inventor 赵金保王昀晖吴比赫
Owner XIAMEN UNIV
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