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Super-capacitor electrode material and preparation method thereof

A technology for supercapacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc. It can solve the problems of low energy density of supercapacitors, and achieve the effects of easy industrial production, easy removal, and simple operation

Inactive Publication Date: 2013-11-13
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the energy density of commercial supercapacitor products is still low (less than 10Wh / kg)

Method used

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  • Super-capacitor electrode material and preparation method thereof
  • Super-capacitor electrode material and preparation method thereof
  • Super-capacitor electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: This supercapacitor electrode material is the carbon nanotube / nickel hydroxide / graphene compound that utilizes microwave method to prepare, and its specific preparation method is directly take graphene as carrier, prepares carbon nanotube / nickel hydroxide / graphite ene complex, comprising the following steps,

[0043] Step 1): First, ultrasonically disperse 60mg of graphene in 120ml of ethylene glycol;

[0044] Step 2): Add 0.025mol / L nickel acetate glycol solution to the mixture obtained in step 1) at room temperature, stir for 2 hours, and adjust the pH of the solution with 0.5mol / L sodium hydroxide glycol solution at Between 9 and 10, continue to stir and react for 1h;

[0045] Step 3): Microwave the mixture obtained in step 2) for 3 minutes at a power of 700W, take it out and heat and stir at 60°C for 10 hours. During the continuous stirring process, add a certain amount of carbon nanotube ethylene glycol slurry, and continue stirring for 2 hours;

[...

Embodiment 2

[0047] Embodiment 2: This supercapacitor electrode material is the carbon nanotube / nickel hydroxide / graphene composite that utilizes microwave method to prepare, and its specific preparation method is to prepare carbon nanotube / nickel hydroxide / graphene composite from graphite oxide, Include the following steps,

[0048] Step 1): Take graphite and sodium nitrate, put them in a certain amount of concentrated sulfuric acid in an ice bath with a mass ratio of 2:1, add potassium permanganate 3 times the mass of the graphite under stirring, mix well, and control the temperature When the temperature is lower than 20°C, raise the temperature to 32-38°C and react for 2 hours, slowly add quantitative deionized water dropwise, stir well, and when the temperature of the system drops, add hydrogen peroxide to terminate the reaction, filter, wash, and dry to obtain graphite oxide;

[0049] Step 2): First, ultrasonically disperse 60 mg of graphite oxide obtained in step 1) in 120 ml of ethy...

Embodiment 3

[0052] Embodiment 3: This supercapacitor electrode material is the carbon nanotube / nickel hydroxide / graphene compound that utilizes microwave method to prepare, and its specific preparation method is directly take graphene as carrier, prepares carbon nanotube / nickel hydroxide / graphite ene complex, comprising the following steps,

[0053] Step 1): First, ultrasonically disperse 30mg of graphene in 60ml of ethylene glycol;

[0054] Step 2): Add 0.025mol / L nickel acetate glycol solution to the mixture obtained in step 1) at room temperature, stir for 2 hours, and adjust the pH of the solution with 0.5mol / L sodium hydroxide glycol solution at Between 9 and 10, continue to stir and react for 1h;

[0055] Step 3): Microwave the mixture obtained in step 2) for 3 minutes at a power of 700W, take it out and heat and stir at 60°C for 10 hours. During the continuous stirring process, add a certain amount of carbon nanotube ethylene glycol slurry, and continue stirring for 2 hours;

[0...

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Abstract

The invention relates to a super-capacitor electrode material and a preparation method thereof. A conventional commercial super-capacitor product still has lower energy density, but the greatest defect of low energy density of the super-capacitor is hopeful to be overcome and the energy density of a carbon nano tube / nickelous hydroxide / graphene composite material can be greatly improved if a carbon nano tube / nickelous hydroxide / graphene composite material with reasonable structure and composition can be manufactured due to the fact that nickelous hydroxide has a large pseudocapacitance value and good reversibility, graphene has a large specific surface area and excellent electrical conductivity, the nickelous hydroxide and the graphene are stacked in a layered manner and can generate an synergistic effect, and a small quantity of conductive carbon nano tubes are doped. The super-capacitor electrode material is a carbon nano tube / nickelous hydroxide / graphene composite prepared with a microwave method. According to the super-capacitor electrode material, micromolecular non-toxic and harmless ethylene glycol is adopted as a reaction medium, microwave heating is adopted to promote fast completion of a reaction, the reaction is finished in one pot, and the prepared composite has a large specific capacity and a large energy density.

Description

technical field [0001] The invention relates to a supercapacitor electrode material and a preparation method thereof, in particular to a carbon nanotube / nickel hydroxide / graphene composite prepared by a microwave method and a specific preparation method thereof. Background technique [0002] Supercapacitors have the characteristics of high power density, long cycle life, good temperature characteristics, short charging time, environmental friendliness, and low cost, filling the gap between batteries and traditional capacitors, and can be used in portable electronic devices, backup power, electric vehicles and Various other micro devices. Electrode material is a key factor affecting the performance and production cost of supercapacitors. An ideal electrode material not only requires a large specific surface area, but also low electrical resistance, appropriate pore size and pore structure, stable chemical and mechanical properties, and good electronic and ion conductivity. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/36H01G11/32H01G11/30H01G11/86
CPCY02E60/13
Inventor 唐水花张秦怡黄韵李星张洁黄朋肖
Owner SOUTHWEST PETROLEUM UNIV
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