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Preparation method of graphene/zinc-aluminium oxide composite material and application of composite material in super capacitor

A zinc-aluminum oxide and supercapacitor technology, applied in the field of electrochemistry, can solve the problems of poor dispersion of composite materials, long reaction time, environmental pollution, etc., and achieve the effect of reducing agglomeration

Inactive Publication Date: 2013-05-15
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is aimed at the shortcomings of existing graphene / zinc-aluminum oxide composite materials such as serious environmental pollution, serious graphene agglomeration, large double metal oxide particle size, poor dispersion of composite materials, and long reaction time. , providing a new preparation method of graphene / zinc-aluminum oxide composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Weigh 0.1g graphite oxide, 0.446gZn(NO 3 ) 2 ·6H 2 O and 0.281gAl(NO 3 ) 3 9H 2 O was dissolved in 150mL of absolute ethanol water, 1mL of deionized water was added, ultrasonically dispersed, and the mixed solution was added to the microwave reactor. Turn on the microwave device, set the lower limit of the reaction temperature to 50°C and the upper limit to 80°C, adjust the microwave power to 250W, and stir until the system starts to reflux. Slowly add 10mL of the pre-prepared deionized water-ammonia water (V:V=9.5:0.5) mixed solution drop by drop, adjust the microwave power to about 300W, control the dropwise addition for 0.5h, and continue the reaction for 1h. Turn off the microwave oven, cool at room temperature, vacuum filter, wash with ethanol for 5 times, and dry in vacuum at 70°C for 12 hours to obtain graphite oxide / zinc-aluminum double metal hydroxide composite material. The graphite oxide / zinc-aluminum double metal hydroxide composite was placed in a tub...

Embodiment 2

[0044] Weigh 0.1g graphite oxide, 0.446gZn(NO 3 ) 2 ·6H 2 O and 0.281gAl(NO 3 ) 3 9H 2 O was dissolved in 150mL of absolute ethanol water, 1mL of deionized water was added, ultrasonically dispersed, and the mixed solution was added to the microwave reactor. Turn on the microwave device, set the lower limit of the reaction temperature to 60°C and the upper limit to 80°C, adjust the microwave power to 250W, and stir until the system starts to reflux. Slowly add 10mL of the pre-prepared deionized water-ammonia water (V:V=9.5:0.5) mixed solution drop by drop, adjust the microwave power to about 300W, control the dropwise addition for 0.5h, and continue the reaction for 1h. Turn off the microwave oven, cool at room temperature, vacuum filter, wash with ethanol for 5 times, and dry in vacuum at 70°C for 12 hours to obtain graphite oxide / zinc-aluminum double metal hydroxide composite material. The graphite oxide / zinc-aluminum double metal hydroxide composite was placed in a tub...

Embodiment 3

[0046] Weigh 0.1g graphite oxide, 0.446gZn(NO 3 ) 2 ·6H 2 O and 0.281gAl(NO 3 ) 3 9H 2 O was dissolved in 150mL of absolute ethanol water, 1mL of deionized water was added, ultrasonically dispersed, and the mixed solution was added to the microwave reactor. Turn on the microwave device, set the lower limit of the reaction temperature to 65°C and the upper limit to 80°C, adjust the microwave power to 300W, and stir until the system starts to reflux. Slowly add 10mL of the pre-prepared deionized water-ammonia water (V:V=9.5:0.5) mixed solution dropwise, adjust the microwave power to about 350W, control the dropwise addition for 0.5h, and continue the reaction for 1h. Turn off the microwave oven, cool at room temperature, vacuum filter, wash with ethanol for 5 times, and dry in vacuum at 70°C for 12 hours to obtain graphite oxide / zinc-aluminum double metal hydroxide composite material. The graphite oxide / zinc-aluminum double metal hydroxide composite was placed in a tube fu...

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Abstract

The invention belongs to the field of chemical and provides a preparation method of a graphene / zinc-aluminium oxide composite material and application of the composite material in a super capacitor. The preparation method comprises the steps of: dissolving a graphite oxide precursor, a zinc salt precursor and an aluminium salt precursor in an organic solvent, adding a small amount of deionized water, and ultrasonically dispersing the mixture to be uniform; transferring a mixed solution to a microwave reactor and then slowly dropwise adding an alkali source compound; and washing a product with alcohol for multiple times, then drying the product in vacuum, putting the product in a tubular furnace, introducing Ar / H2 mixed gas, and carrying out high-temperature thermal pyrolysis, thereby obtaining the finished product, namely the graphene / zinc-aluminium oxide composite material. No toxic chemical agent is used in the reduction of graphene, so that harm to human bodies and environment pollution, caused by a great quantity of harmful chemical agents such as hydrazine hydrate serving as a strong reducing agent used in a chemical reduction method, are eliminated fundamentally.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a preparation method of a graphene / zinc-aluminum oxide composite material and its application in supercapacitors. Background technique [0002] Supercapacitors, also known as electrochemical capacitors or ultra-large-capacity capacitors, are a new type of energy storage device between traditional capacitors and rechargeable batteries. Traditional chemical power sources. Due to its short charging time, long charging and discharging life, high power density and wide operating temperature range, supercapacitors are widely used in national defense, railways, electric vehicles, electronics, communications, aerospace and other fields (Niu Yulian, Jin Xin, Zheng Jia , Li Zaijun, Gu Zhiguo, Yan Tao, Fang Yinjun, Journal of Inorganic Chemistry, 2012, 28(9), 1878-1884). According to different energy storage mechanisms, supercapacitors can be divided into two types: o...

Claims

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Application Information

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IPC IPC(8): H01G11/32H01G11/46H01G11/86
CPCY02E60/13
Inventor 李在均孔惠宁奇严琳
Owner JIANGNAN UNIV
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