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Method of preparing super-capacitor electrode material

A technology for supercapacitors and electrode materials, applied in the fields of new energy materials and chemical power sources, can solve the problems of unsatisfactory electrochemical characteristics such as high current discharge power characteristics and cycle life, and achieve excellent electrochemical performance, high yield, wide The effect of the application foreground

Inactive Publication Date: 2013-01-30
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with electric double-layer capacitors, the specific capacitance of Faraday pseudocapacitors is 10-100 times that of the former, but the electrochemical characteristics such as power characteristics and cycle life of high-current discharge are not ideal

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  • Method of preparing super-capacitor electrode material
  • Method of preparing super-capacitor electrode material
  • Method of preparing super-capacitor electrode material

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preparation example Construction

[0025] figure 1 The implementation flow of the preparation method of the supercapacitor electrode material provided by the embodiment of the present invention is shown; specifically, the following steps are included:

[0026] S1: Preparation of nanorod precursor powder

[0027] Mix the transition metal salt with urea or sodium hydroxide solution evenly, heat it in a hydrothermal reactor and keep it warm until the reaction is complete, cool, wash and dry to obtain the nanorod precursor powder;

[0028] S2: Preparation of electrode materials

[0029] Using deionized water as a solvent, mix the nanorod precursor powder and sulfur source evenly, heat in the hydrothermal reaction kettle, keep warm until the reaction is complete, cool, wash and dry to obtain nanotube electrode materials.

[0030] In the embodiment of the present invention, the nanorod precursor is firstly prepared by a hydrothermal method; then the precursor is mixed with a sulfur source, and the electrode materia...

Embodiment 1

[0033] (1) Preparation of precursor: Weigh 7mmol of CoCl respectively 2 ·6H 2 0 and 7 mmol of urea were placed in a reaction kettle, then filled with deionized water, magnetically stirred until uniform, and then placed in a drying oven at 80, 90, 100, 110, 120, 140, 160, and 200°C for 10 Hour. Then stop heating and cool to room temperature naturally. The sample was taken out for suction filtration, washed three times with deionized water and absolute ethanol, and dried in a blast drying oven at 60°C for 12 hours to obtain the precursor powder.

[0034] (2) Preparation of electrode materials: weigh 40 mg of precursor powder and 120 mg of Na 2 S·9H 2 O, put in a 50ml reaction kettle, then add 30ml deionized water, stir until uniform, and then keep it in a drying oven at 100, 180, and 250°C for 8 hours. Then stop heating and cool to room temperature naturally. The sample was taken out for suction filtration, washed three times with deionized water and absolute ethanol, and ...

Embodiment 2

[0042] (1) Take a certain quality of zinc chloride and sodium hydroxide to make 50ml of zinc tetrahydroxide solution as a stock solution, the ratio of zinc ion and hydroxide concentration in it is 1:20, add 5ml of stock solution to 10ml of water and 25ml of ethanol were mixed and ultrasonicated for 30min, then transferred to a 60ml lined reaction kettle, and reacted at a constant temperature of 180°C in a drying oven for 20 hours, stopped heating, cooled naturally, washed, and dried to obtain zinc oxide nanorods.

[0043] (2) Weigh the Na of zinc oxide nanorod 100mg and 600mg obtained above 2 S·9H 2 O was placed in a 50ml reaction kettle, and then 30ml of deionized water was added, magnetically stirred until uniform, and then kept in a drying oven at 180°C for 8 hours. Then stop heating and cool to room temperature naturally. The sample was taken out for suction filtration, washed three times with deionized water and absolute ethanol, and dried in a blast drying oven at 60°C...

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Abstract

The invention discloses a method of preparing a super-capacitor electrode material. The method comprises: step S1: preparing a nanorod precursor powder: uniformly fixing transition metal salt and carbamide or sodium hydroxide solution, and after heating in a hydrothermal reaction kettle, keeping temperature until the reaction is finished, after cooling, cleaning and drying, obtaining the nanorod precursor powder; and step S2: preparing the electrode material; taking deionized water as a solvent, uniformly mixing the nanorod precursor powder and a sulfur source, after heating in the hydrothermal reaction kettle, keeping temperature until the reaction is finished, after cooling, cleaning and drying, obtaining the nanotube electrode material. According to the method of preparing the super-capacitor electrode material, the nanorod precursor is prepared by hydrothermal method; then, the electrode material is obtained by mixing precursor and the sulfur source and performing the hydrothermal reaction; the reaction process is safe and environment-friendly and the process is simple; in addition, the calibers of the nanotubes are uniform and can be controlled, the production rate of the nanotube is high and the nanotube has excellent electrochemical performances, so that the nanotube has broad application prospects.

Description

technical field [0001] The invention belongs to the field of new energy materials and chemical power sources, and more specifically relates to a preparation method of a supercapacitor electrode material. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are new energy storage devices between traditional capacitors and batteries. Compared with traditional capacitors, supercapacitors have higher specific capacitance and specific energy, a higher operating temperature range and extremely long service life; compared with batteries, they have higher specific power and can instantly release large It has the characteristics of short charging time, high charging efficiency, long cycle life, no memory effect, basically no maintenance and no pollution to the environment. This kind of supercapacitor has broad application prospects in the communication market, computer market, new energy vehicles, consumer electronics, military equipment and other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00C01G9/08C01G45/00H01G9/042
CPCY02E60/13
Inventor 江建军万厚钊吉晓陈海潮别少伟
Owner HUAZHONG UNIV OF SCI & TECH
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