Preparation method of 3D coralline graphene/NiCo2O4 composite material and application of same in super capacitor

A supercapacitor and composite material technology, which is applied in the chemical industry, can solve the problems of slow mass transfer, time-consuming and energy-consuming, serious agglomeration of composite materials, etc., and achieve the effects of saving costs, reducing energy consumption, and large specific surface area

Inactive Publication Date: 2015-04-29
江苏江大环保科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is exactly for existing preparation GS / NiCo 2 o 4 Composite materials are prone to severe agglomeration and time-consuming and energy-consuming, and have slow mass transfer in electrochemical reactions, etc., providing a new 3D coral-like GS / NiCo 2 o 4 Preparation method of composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Disperse 10 mg of GO in a mixed solvent of absolute ethanol-water (V:V=10:0), ultrasonically disperse to form a suspension, add 0.582 g of nickel nitrate hexahydrate and 1.164 g of cobalt nickel nitrate hexahydrate, Stir to dissolve completely. Transfer the above suspension to a microwave-assisted heating device, adjust the microwave power to 300W, heat to reflux, add 10 mL of ammonia water to react for 10 min, cool, centrifuge, collect the precipitate, wash twice with absolute ethanol, and dry in vacuum at 50 °C to prepare GO / nickel-cobalt layered double hydroxide composites were obtained. The obtained GO / nickel-cobalt layered double hydroxide was calcined in a tube furnace at 800 °C for 2 h, and the precipitate was collected. Get 3D coral-like graphene / NiCo 2 o 4 composite material. 30 mg 3D coral-like graphene / NiCo 2 o 4 The composite material was ground and mixed with 5.6 mg acetylene black, a little polytetrafluoroethylene binder (15%) was added, a small amou...

Embodiment 2

[0033] Disperse 20 mg of GO in anhydrous ethanol-water (V:V=9:1) mixed solvent, ultrasonically disperse to form a suspension, add 0.582 g nickel nitrate hexahydrate, 1.164 g cobalt nickel nitrate hexahydrate salt, Stir to dissolve completely. Transfer the above suspension to a microwave-assisted heating device, adjust the microwave power to 400W, heat to reflux, add 10 mL of ammonia water to react for 15 min, cool, centrifuge, collect the precipitate, wash with absolute ethanol three times, and dry under vacuum at 60 °C. GO / nickel-cobalt layered double hydroxide composites were prepared. The obtained GO / nickel-cobalt layered double hydroxide was calcined in a tube furnace at 700 °C for 3 h, and the precipitate was collected. Get 3D coral-like graphene / NiCo 2 o 4 composite material. 30 mg 3D coral-like graphene / NiCo 2 o 4 The composite material was ground and mixed with 5.6 mg acetylene black, a little polytetrafluoroethylene binder (15%) was added, a small amount of abso...

Embodiment 3

[0035] Disperse 30 mg of GO in anhydrous ethanol-water (V: V=9.9: 0.1) mixed solvent, ultrasonically disperse to form a suspension, add 0.582 g nickel nitrate hexahydrate, 1.164 g cobalt nickel nitrate hexahydrate salt, Stir to dissolve completely. Transfer the above suspension to a microwave-assisted heating device, adjust the microwave power to 400W, heat to reflux, add 10 mL of ammonia water to react for 20 min, cool, centrifuge, collect the precipitate, wash with absolute ethanol three times, and dry under vacuum at 60 °C. GO / nickel-cobalt layered double hydroxide composites were prepared. The obtained GO / nickel-cobalt layered double hydroxide was calcined in a tube furnace at 800 °C for 2 h, and the precipitate was collected. Get 3D coral-like graphene / NiCo 2 o 4 composite material. 30 mg 3D coral-like graphene / NiCo 2 o 4 The composite material was ground and mixed with 5.6 mg acetylene black, a little polytetrafluoroethylene binder (15%) was added, a small amount o...

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Abstract

The invention belongs to the chemistry field, and provides a preparation method of a 3D coralline graphene / NiCo2O4 composite material and the application of the 3D coralline graphene / NiCo2O4 composite material in a super capacitor. The preparation method comprises the steps that (1) GO is synthesized; (2) Ni-Co salt and an alkali source are added into suspension liquid of the GO, and microwave heating is carried out to assist in preparing a GO / Ni-Co layered double metal hydroxide composite material; (3) high-temperature calcination is carried out on the prepared GO / Ni-Co layered double metal hydroxide composite material to manufacture the 3D coralline graphene / NiCo2O4 composite material; (4) an electrode plate is manufactured, the simulation super capacitor is assembled, and the performance of the simulation super capacitor is evaluated. Compared with the prior art, the 3D coralline graphene / NiCo2O4 composite material prepared through the preparation method is more excellent in electrical conductivity, larger in specific area, smaller in mass transfer resistance and longer in cycle life. Furthermore, when applied to the electrode material of the super capacitor, the synthetic 3D coralline graphene / NiCo2O4 composite material is much superior than existing precious metal oxide in cost and performance.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a 3D coral-like graphene / NiCo 2 o 4 Preparation methods of composite materials and their application in supercapacitors. Background technique [0002] Supercapacitor is a new type of energy storage device developed in the 1970s and 1980s. It is a power supply with special performance between traditional capacitors and batteries. It mainly relies on electric double layer and redox quasi-capacitance to store electric energy. , which is different from traditional chemical power sources. The outstanding advantages of supercapacitors are high power density, short charging time, long cycle life and wide operating temperature range. They have broad application prospects in national defense, railways, electric vehicle electronics, communications, aerospace and other fields. According to the energy storage mechanism, supercapacitors can be divided into electric double-layer capacitors ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/38H01G11/86
CPCY02E60/13H01G11/24H01G11/30H01G11/36H01G11/86
Inventor 李在均严涛蔡金飞张明
Owner 江苏江大环保科技开发有限公司
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