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Preparation method of super capacitor electrode material (nickel oxide)

A technology for supercapacitors and electrode materials, applied in nickel oxide/nickel hydroxide and other directions, can solve the problems of high cost and complicated preparation process, and achieve the effects of low cost, simple preparation method and good electrochemical stability.

Inactive Publication Date: 2013-01-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Porous Ni was recently reported with Au as the current collector and then MnO deposited on it 2 , can increase the specific capacitance (H.G.Zhang, et.al, Nat.Nanotechnol.2011, 6, 277; X.Y.Lang, et.al, Nat.Nanotechnol.2011, 6, 232.), but the preparation process is complicated and the cost is high, which limits its Large-scale practical application

Method used

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  • Preparation method of super capacitor electrode material (nickel oxide)
  • Preparation method of super capacitor electrode material (nickel oxide)
  • Preparation method of super capacitor electrode material (nickel oxide)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh the raw material nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) 3.4mmol 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;

[0026] (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, react at 180°C for 6 hours, and then cool Reactor to room temperature.

[0027] (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 supercapacitor oxidation Nickel electrode material.

Embodiment 2

[0029] (1) Weigh the raw material nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 (0) 2mmol and 0.05g of polyvinylpyrrolidone (PVP) were dissolved in methanol and water, and stirred to prepare a mixed solution; wherein, the volumes of methanol and water were 41ml and 7ml respectively;

[0030] (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, react at 150°C for 24 hours, and then cool Reactor 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 supercapacitor oxidation Nickel electrode material.

Embodiment 3

[0033] (1) Weigh the raw material nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 (0) 4mmol and 1g of polyvinylpyrrolidone (PVP) were dissolved in methanol and water, and stirred to prepare a mixed solution; wherein, the volumes of methanol and water were 40ml and 8ml respectively;

[0034] (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, react at 180°C for 3 hours, and then cool Reactor 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 supercapacitor oxidation Nickel electrode material.

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Abstract

The invention relates to a preparation method of a super capacitor electrode material (nickel oxide). The preparation method comprises the steps as follows: nickel nitrate hexahydrate (Ni(NO3)2.6H2O) and polyvinylpyrrolidone (PVP) are dissolved in methanol and water and stirred to prepare a mixed solution; the mixed solution is poured into a polytetrafluoroethylene hydrothermal reaction kettle to react for 3-24 hours under the hydrothermal condition of 150-200 DEG C, and then the reaction kettle is cooled to the room temperature; a product obtained through centrifugation is washed and dried; a dried sample is calcined; and the obtained sample is the super capacitor electrode material. The invention has the advantages that the method is simple and environment-friendly and is low in cost and suitable for mass production; and the prepared porous floriform electrode material (nickel oxide) not only has higher specific capacitance, but also has favorable electrochemical stability, and is a superior super capacitor electrode material.

Description

technical field [0001] The invention belongs to the field of preparation of electrode materials, and in particular relates to a preparation method of nickel oxide, an electrode material of a supercapacitor. 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. Electrochemical capacitors, also known as supercapacitors, are capacitors with better performance than traditional capacitors. Because this new type of energy device can store more than an order of magnitude more energy than traditional physical capacitors, it also has high power density. , short charging time, long service life and other advantages, it is widely used in electric vehicles, military, mobile communication equipment and oth...

Claims

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Application Information

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IPC IPC(8): C01G53/04
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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