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Preparation method for cobalt-nickel oxide composite material as supercapacitor electrode material

A technology of cobalt-nickel oxide and supercapacitors, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve problems such as easy to cause danger, achieve cheap prices, increase specific capacitance, and good electrochemical stability Effect

Active Publication Date: 2014-01-22
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method uses methanol as a reaction solvent, and methanol is a volatile and toxic solvent. Because of its low boiling point, the reaction at high temperature is prone to danger.

Method used

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  • Preparation method for cobalt-nickel oxide composite material as supercapacitor electrode material
  • Preparation method for cobalt-nickel oxide composite material as supercapacitor electrode material
  • Preparation method for cobalt-nickel oxide composite material as supercapacitor electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh 2.5mmo1 nickel acetate tetrahydrate (C 4 h 6 NiO 4 4H 2 O) and 2.5mmol cobalt acetate tetrahydrate (C 4 h 6 CoO 4 4H 2 O) Dissolve in a mixed solution of 10mL ethylene glycol and 36mL water, stir for 20 minutes, nickel acetate is completely dissolved, then add 0.005g glucose, and continue stirring for 10 minutes to obtain a mixed solution:

[0029] (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 16 hours, and then cool the reaction Kettle to room temperature.

[0030] (3) Centrifuge the obtained product, wash with deionized water and ethanol respectively, and dry; put the dried sample into a muffle furnace and calcinate at 450°C for 2 hours; the final sample obtained is a supercapacitor cobalt-nickel oxide electrode material.

[0031] The SEM figure of the cobalt-nickel oxide composite materia...

Embodiment 2

[0034] (1) Take by weighing 3mmol nickel acetate tetrahydrate (C 4 h 6 NiO 4 4H 2 O) and 4mmol cobalt acetate tetrahydrate (C 4 h 6 CoO 4 4H 2 O) be dissolved in the mixed solution that 23mL ethylene glycol and 23mL water form, stir 10 minutes, nickel acetate dissolves completely, then add 0.010g glucose, continue to stir for 20 minutes again, make mixed solution;

[0035] (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 160°C for 24 hours, and then cool the reaction Kettle to room temperature.

[0036] (3) Centrifuge the obtained product, wash with deionized water and ethanol respectively, and dry; put the dried sample into a muffle furnace and calcinate at 450°C for 1 hour; the final sample obtained is supercapacitor cobalt-nickel oxide electrode material.

Embodiment 3

[0038] (1) Weigh 2mmol nickel acetate tetrahydrate (C4 h 6 NiO 4 4H 2 O) and 3 mmol cobalt acetate tetrahydrate (C 4 h 6 CoO 4 4H 2 O) be dissolved in the mixed solution that 30mL ethylene glycol and 16mL water form, stir 30 minutes, nickel acetate dissolves completely, then add 0.005g glucose, continue to stir for 20 minutes again, make mixed solution;

[0039] (2) Pour the above mixed solution into the polytetrafluoroethylene hydrothermal reaction kettle, keep the filling degree of 80%, put the hydrothermal reaction kettle into the blast drying oven, react at 180°C for 12 hours, then cool the reaction Kettle to room temperature.

[0040] (3) Centrifuge the obtained product, wash with deionized water and ethanol respectively, and dry; put the dried sample into a muffle furnace and calcinate at 450°C for 3 hours; the final sample obtained is supercapacitor cobalt-nickel oxide electrode material.

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Abstract

The invention relates to a preparation method for a cobalt-nickel oxide composite material as a supercapacitor electrode material. The preparation method includes the following steps: (1) nickel acetate tetrahydrate and cobalt acetate tetrahydrate are dissolved into the mixture of glycol and water, glucose is added after stirring, stirring is then continued, and thereby mixed solution is prepared; (2) the mixed solution is poured into a hydrothermal reaction kettle to react under 100 DEG C to 200 DEG C for 2 to 48 hours, the hydrothermal reaction kettle is then cooled to room temperature, and thereby reaction product is obtained; (3) the reaction product obtained in step 2 is centrifuged, washed and dried, the dried sample is calcined, and thereby the cobalt-nickel oxide composite material is obtained. Compared with the prior art, the method is simple, environment-friendly and low-cost, and is suitable for mass production, and the prepared hydrangea-shaped cobalt-nickel oxide electrode material has high specific capacitance, and is an excellent supercapacitor electrode material.

Description

technical field [0001] The invention relates to a preparation method of an electrode material, in particular to a preparation method of a supercapacitor electrode material cobalt-nickel oxide composite material. Background technique [0002] With the development of society, people's demand for energy is increasing, but because traditional fossil energy cannot be regenerated and causes serious pollution to the environment, people are looking for new energy that is environmentally friendly, renewable, and highly utilizable. . Along with the development of new energy sources, there is an urgent need to develop new high-efficiency, low-cost, environmentally friendly, and high-performance energy conversion and storage systems. Therefore, supercapacitors have emerged as the times require. Supercapacitors are also called electrochemical capacitors. They are capacitors with better performance than traditional capacitors. They have hundreds of times higher energy density than tradit...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/24H01G11/46
CPCY02E60/13
Inventor 刘锡建肖稳发王远强孙彦刚徐菁利
Owner SHANGHAI UNIV OF ENG SCI
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