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A kind of preparation method of supercapacitor electrode material carbon-coated nickel oxide niO/c

A technology for supercapacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve problems such as the inability to uniformly coat NiO electrode materials, and solve the difficulty of large-scale application, increase specific capacitance, and improve Effect of rate ratio capacitance

Inactive Publication Date: 2016-08-10
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of these methods can uniformly coat NiO electrode materials, so it is still a challenge to develop an effective method to uniformly coat NiO electrode materials.

Method used

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  • A kind of preparation method of supercapacitor electrode material carbon-coated nickel oxide niO/c
  • A kind of preparation method of supercapacitor electrode material carbon-coated nickel oxide niO/c
  • A kind of preparation method of supercapacitor electrode material carbon-coated nickel oxide niO/c

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Experimental program
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Effect test

Embodiment 1

[0024] (1) Weigh the raw material nickel acetate (Ni(CH 3 COO) 2 4H 2 (0) 5mmol, urea (2g) and polyvinylpyrrolidone (PVP) 1g were dissolved in absolute ethanol and water, and stirred to prepare a mixed solution; wherein, the volumes of the absolute ethanol and water were 10ml and 40ml respectively;

[0025] (2) Pour the above mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle, keep the filling degree of 80%, put the hydrothermal reaction kettle into a blast drying oven, and react under hydrothermal conditions of 180°C for 8 hours , and then cooled the reactor to room temperature.

[0026] (3) The obtained product was centrifuged, washed with deionized water and ethanol solvent, and dried; the dried sample was put into a muffle furnace and calcined at 1°C / min to 450°C for 40min.

[0027] (4) Weigh 0.2 g of the NiO sample and dissolve it in 36 ml of glucose solution, and stir to prepare a mixed solution; wherein, the concentration of the glucose soluti...

Embodiment 2

[0031] (1) Weigh the raw material nickel acetate (Ni(CH 3 COO) 2 4H 2 (0) 5mmol, urea (3g) and polyvinylpyrrolidone (PVP) 1g were dissolved in absolute ethanol and water, and stirred to prepare a mixed solution; wherein, the volumes of the absolute ethanol and water were 10ml and 40ml respectively;

[0032] (2) Pour the above mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle, keep the filling degree of 80%, put the hydrothermal reaction kettle into a blast drying oven, and react for 3 hours under the hydrothermal condition of 200°C , and then cooled the reactor to room temperature.

[0033] (3) The obtained product was centrifuged, washed with deionized water and ethanol solvent, and dried; the dried sample was put into a muffle furnace and calcined at 1°C / min to 450°C for 40min.

[0034] (4) Weigh 0.3 g of the NiO sample and dissolve it in 36 ml of glucose solution, and stir to prepare a mixed solution; wherein, the concentration of the glucose sol...

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Abstract

The invention relates to a preparation method for carbon-coated nickel oxide NiO / C as a supercapacitor electrode material, comprising the steps that (1) nickel acetate Ni (CH3COO)2.4H2O, urea and polyvinylpyrrolidone are dissolved in absolute ethyl alcohol and water and stirred, so that a mixed solution is obtained; (2) the mixed solution is subjected to hydrothermal reaction, and after the reaction is finished, the mixed solution is cooled, centrifuged, rinsed, dried and calcined, so the NiO material is obtained; (3) the NiO is dissolved in a glucose solution and stirred, to obtain a mixed solution, the mixed solution is subjected to hydrothermal reaction, and after the reaction is finished, the mixed solution is cooled, centrifuged, rinsed, dried and calcined, so that the carbon-coated nickel oxide NiO / C is obtained. The NiO / C electrode material prepared by the method disclosed by the invention is in porous structure and has high specific surface area, meanwhile the overall conductivity of the NiO electrode material can be improved due to the carbon layer, and the carbon and the NiO have synergistic effect, so that the specific capacitance and speed ratio capacitance, and the NiO / C is an excellent supercapacitor electrode material.

Description

technical field [0001] The invention belongs to the field of preparation of capacitor electrode materials, in particular to a preparation method of carbon-coated nickel oxide NiO / C as an electrode material of super capacitors. Background technique [0002] With the rapid development of the global economy, the continuous consumption of fossil energy, and the increasingly serious environmental pollution, it is becoming more and more important to study a high-efficiency, low-cost, environmentally friendly, and high-performance energy conversion and storage system. Supercapacitors have the advantages of high power density, short charging time and long service life, so they are widely used in electric vehicles, military, mobile communication equipment and other fields, which has attracted extensive attention of scientific researchers. Supercapacitors can be divided into electrochemical double layer capacitors and Faraday pseudocapacitors. Carbon materials have been used in elect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30
CPCY02E60/13
Inventor 胡俊青徐开兵邹儒佳李文尧安磊
Owner DONGHUA UNIV