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Method for preparing porous hybridization NiO/Co3O4 electrode material of super capacitor

A technology for supercapacitors and electrode materials, applied in capacitors, electrolytic capacitors, circuits, etc., can solve the problems of limiting large-scale practical applications of energy storage, low output of synthetic products, low repetition rate, etc., and achieve good supercapacitor performance with simple methods , low cost effect

Inactive Publication Date: 2013-01-30
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current methods for preparing composite electrode materials are complex, time-consuming, and the repetition rate is not high. Most importantly, the yield of these synthetic products is very low, thus limiting the large-scale practical application in energy storage.

Method used

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  • Method for preparing porous hybridization NiO/Co3O4 electrode material of super capacitor
  • Method for preparing porous hybridization NiO/Co3O4 electrode material of super capacitor
  • Method for preparing porous hybridization NiO/Co3O4 electrode material of super capacitor

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Effect test

Embodiment 1

[0029] (1) Weigh the raw material nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) 2.72mmol, cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 (0) 0.68mmol and 0.5g of polyvinylpyrrolidone (PVP) were dissolved in methanol and water, and stirred to prepare a mixed solution; wherein, the volumes of methanol and water were 43ml and 5ml respectively;

[0030] (2) Pour the above mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle to maintain a filling degree of 80%, put the hydrothermal reaction kettle into a blast drying oven, and react under hydrothermal conditions of 180°C for 6 hours, Afterwards, the reaction kettle was cooled to room temperature.

[0031] (3) The product obtained by centrifugation was washed with deionized water and ethanol solvent respectively, and dried; the dried sample was placed in a muffle furnace and calcined at 450°C for 40 minutes; the final black sample obtained was a supercapacitor electrode material.

Embodiment 2

[0033] (1) Weigh the raw material nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) 2.04mmol, cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) 1.36mmol and 0.5g of polyvinylpyrrolidone (PVP) were dissolved in methanol and water, and stirred to prepare a mixed solution; wherein, the volumes of methanol and water were 43ml and 5ml respectively;

[0034] (2) Pour the above mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle to maintain a filling degree of 80%, put the hydrothermal reaction kettle into a blast drying oven, and react under hydrothermal conditions of 180°C for 6 hours, Afterwards, the reaction kettle was cooled to room temperature.

[0035](3) The product obtained by centrifugation was washed with deionized water and ethanol solvent respectively, and dried; the dried sample was placed in a muffle furnace and calcined at 450°C for 40 minutes; the final black sample obtained was a supercapacitor electrode material.

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Abstract

The invention relates to a method for preparing a porous hybridization NiO / Co3O4 electrode material of a super capacitor. The method comprises the following steps of: (1) dissolving nickel nitrate hexahydrate Ni(NO3)2.6H2O, cobalt nitrate hexahydrate Co(NO3)2.6H2O and polyvinylpyrrolidone (PVP) into a mixed solution of methanol and water, stirring, and thus obtaining a mixed solution; (2) reacting for 3 to 24 hours under the hydrothermal condition of 150 DEG C to 200 DEG C, and then cooling to room temperature; and (3) centrifuging, washing and drying a product, putting a dried sample into a muffle furnace, roasting the dried sample, and thus obtaining the porous hybridization NiO / Co3O4 electrode material. The method is simple, environment-friendly, low in cost and applicable to large-scale production. The electrode material of the super capacitor, which is prepared by using the method, is high in specific capacitance and high in electrochemical stability.

Description

technical field [0001] The invention belongs to the field of preparation of supercapacitor electrode materials, in particular to a porous hybrid NiO / Co 3 o 4 A method for preparing an electrode material for a supercapacitor. Background technique [0002] With the rapid development of the global economy, the continuous consumption of fossil energy, and the increasing 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 attracted much attention due to their high power density, wide operating temperature range, long life, and environmental friendliness. It has important and broad application prospects and has become a research hotspot all over the world. [0003] Electrochemical capacitors can be divided into two categories according to the charge storage mechanism: one type of electrochemical double layer capacitor, the e...

Claims

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Application Information

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IPC IPC(8): H01G9/042
CPCY02E60/13
Inventor 胡俊青徐开兵邹儒佳薛雅芳李文尧刘锡建王滕李博
Owner DONGHUA UNIV
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