A simple preparation method for cobalt-nickel sulfide nanosheets used as electrode materials for supercapacitors

A supercapacitor, cobalt-nickel sulfide technology, applied in chemical instruments and methods, inorganic chemistry, nickel compounds, etc., to achieve the effect of simple synthesis process, easy control, and high specific capacity

Active Publication Date: 2018-06-19
东营睿港管道工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Based on the above, cobalt nickel sulfide nanosheet electrode materials with high capacity, high energy density and mass production have not been reported yet.

Method used

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  • A simple preparation method for cobalt-nickel sulfide nanosheets used as electrode materials for supercapacitors
  • A simple preparation method for cobalt-nickel sulfide nanosheets used as electrode materials for supercapacitors
  • A simple preparation method for cobalt-nickel sulfide nanosheets used as electrode materials for supercapacitors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A simple preparation method for supercapacitor electrode material cobalt nickel sulfide nanosheets. The method for preparing cobalt nickel sulfide nanosheets includes the following steps:

[0020] ⑴ Weigh 1.455g of Co(NO 3 ) 2 , 1.454g of Ni(NO 3 ) 2 ·6H 2 O, 1.6406g of NaAC is dissolved in a mixed solution of 20ml polyethylene glycol and 20ml ethylene glycol, dispersed by ultrasound to form a homogeneous solution, after stirring for 30 minutes, the above-obtained mixed solution is put into a 40mL reactor and reacted at 200℃ After 14 hours, take the suspension, wash it by centrifugation, and dry it in a vacuum at 60°C for 12 hours to obtain a cobalt-nickel nanosheet precursor (Ni:Co=1:1);

[0021] ⑵Weigh 60mg of the cobalt-nickel precursor (Ni:Co=1:1) obtained in step ⑴, re-disperse in 40ml of absolute ethanol, add 120mg of thioacetamide (TAA), disperse it by ultrasound, and transfer to the reactor In the medium, react at 150°C for 1 hour, take the suspension, wash it by cen...

Embodiment 2

[0026] ⑴ Weigh 2.9103g of Co(NO 3 ) 2 , 1.4543g of Ni(NO 3 ) 2 ·6H 2 O, 2.4609g of NaAC is dissolved in a mixed solution of 20ml polyethylene glycol and 20ml ethylene glycol, dispersed by ultrasonic to form a homogeneous solution, after stirring for 30 minutes, the above-obtained mixed solution is put into a 40mL reactor and reacted at 180℃ After 16 hours, the suspension was taken, washed by centrifugation, and dried in a vacuum at 60° C. for 12 hours to obtain a cobalt-nickel nanosheet precursor (Ni:Co=1:2).

[0027] ⑵Weigh 60mg of the cobalt-nickel precursor (Ni:Co=1:1) obtained in step ⑴, re-disperse in 40ml of absolute ethanol, add 120mg of thioacetamide (TAA), disperse it by ultrasound, and transfer to the reactor In the medium, react at 130°C-150°C for 1-2 hours, take the suspension, wash it by centrifugation, and dry it under vacuum at 60°C for 12 hours. The sample is labeled Cobalt Nickel Sulfide Nanosheets (Ni:Co=1:2).

[0028] For the XRD test results in this example: fig...

Embodiment 3

[0031] ⑴ Weigh 1.455g of Co(NO 3 ) 2 , 2.908g of Ni(NO 3 ) 2 , 2.4609g of NaAC was dissolved in a mixed solution of 20ml polyethylene glycol and 20ml ethylene glycol, dispersed by ultrasound to form a uniform solution, stirred for 30 minutes, put the above-obtained mixed solution into a 40mL reactor, and reacted at 200℃ for 15 After hours, the suspension was taken, washed by centrifugation, and dried under vacuum at 60° C. for 12 hours to obtain a cobalt-nickel nanosheet precursor (Ni:Co=2:1).

[0032] ⑵Weigh 60mg of the cobalt-nickel nanosheet precursor (Ni:Co=1:1) obtained in step ⑴, re-disperse in 40ml absolute ethanol, add 120mg thioacetamide (TAA), disperse it by ultrasonic and transfer to In the reaction kettle, react at 130°C-150°C for 1-2 hours, take the suspension, wash it by centrifugation, and dry it under vacuum at 60°C for 12 hours. The sample is labeled Cobalt Nickel Sulfide Nanosheets (Ni:Co=2:1).

[0033] For the XRD test results in this example: figure 1 As shown i...

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Abstract

The invention relates to a simple preparation method of a cobalt nickel sulfide nanosheet serving as a supercapacitor electrode material by adoption of a simple two-step solvothermal technique. The simple preparation method of the cobalt nickel sulfide nanosheet serving as the supercapacitor electrode material includes: adopting transition metal salt cobalt nitrate, nickel nitrate and anhydrous sodium acetate as reaction raw materials, and respectively adopting polyethylene glycol, ethylene glycol and ethyl alcohol as solvents and taking TAA (thioacetamide) as a sulfur source to prepare the cobalt nickel sulfide nanosheet according to a two-step solvothermal method. The cobalt nickel sulfide nanosheet prepared according to the method has advantages of high repeatability, simplicity in synthesis process, easiness in control and high yield. The laminar structure is beneficial to surface quick action of electrolyte ions and electrodes, efficient charging and discharging are benefited, and a high specific capacity can be provided.

Description

Technical field [0001] The invention belongs to the technical field of transition metal sulfide preparation technology and super capacitor electrode material technology, in particular to a convenient preparation method for super capacitor electrode material cobalt nickel sulfide nanosheets. Background technique [0002] As a typical transition metal sulfide, cobalt nickel sulfide is easy to prepare, environmentally friendly, non-toxic, and has excellent optical, magnetic and electrochemical properties, and can be widely used in the fields of electrocatalysis, solar cells and supercapacitors. Receive more and more attention and research enthusiasm. Compared with the binary metal sulfides (NiSx, CoSx), the ternary metal cobalt nickel sulfide introduces new metal atoms in the structure to cause a change in the crystal structure, thereby improving its optical, magnetic and electrochemical properties . Therefore, compared with single metal sulfide, cobalt nickel sulfide has higher c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/00
CPCC01G53/006C01P2002/72C01P2004/03C01P2004/04C01P2004/61
Inventor 胡勇李志鹏沈峻岭
Owner 东营睿港管道工程有限责任公司
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