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Preparation method of semi-spherical active carbon electrode material of super capacitor

A technology for supercapacitors and electrode materials, which is applied in capacitors, electrolytic capacitors, circuits, etc., can solve the problems of low migration rate of electrolyte electrolyte and limit the charge and discharge power of supercapacitors, that is, power density, etc., and achieve increased pore size and reaction conditions Gentle, easy-to-step results

Inactive Publication Date: 2011-01-19
JIANGXI UNIVERSITY OF FINANCE AND ECONOMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of pore size in the mesopore and microporous structure, the electrolyte diffusion and electrolyte migration rate are not high, so the charging and discharging power of the supercapacitor is limited, that is, the power density
For many application fields, it is required to be able to complete ultra-high current and fast charging and discharging in an instant. In this case, it is difficult for existing activated carbon materials to meet this requirement.

Method used

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  • Preparation method of semi-spherical active carbon electrode material of super capacitor
  • Preparation method of semi-spherical active carbon electrode material of super capacitor
  • Preparation method of semi-spherical active carbon electrode material of super capacitor

Examples

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Embodiment 1

[0014] Preparation of hemispherical activated carbon: first dissolve 10% glucose in deionized water, then add 1g of foaming agent sodium lauryl sulfate, transfer it to an autoclave after it is completely dissolved, and react under hydrothermal conditions at 100°C for 7h. The product was washed, filtered, and dried, and then carbonized at 700°C for 3 hours under the protection of a reducing atmosphere. Natural cooling and grinding to obtain hemispherical activated carbon. figure 1 For the SEM photograph of the sample, from figure 1 A clear hemispherical structure can be seen. The hemispherical activated carbon prepared by this method has a specific surface area of ​​911.21m 2 / g.

[0015] Preparation of activated carbon electrode: Mix activated carbon, carbon black and polytetrafluoroethylene emulsion according to the mass ratio of 65:30:5, adjust it into a slurry, and evenly coat it on the foamed nickel, use a powder tablet press with 15MPa Press the electrode sheet into a...

Embodiment 2

[0017] Preparation of hemispherical activated carbon: Dissolve glucose in deionized water first, then add 1 g of foaming agent sodium bicarbonate, transfer to autoclave after complete dissolution, and react at 160°C for 9 hours under hydrothermal conditions. The product was washed, filtered, and dried, and then carbonized at 850°C for 3 hours under the protection of a reducing atmosphere. Natural cooling and grinding to obtain hemispherical activated carbon. The hemispherical activated carbon prepared by this method has a specific surface area of ​​851.75m 2 / g.

[0018] Preparation of activated carbon electrode: Mix activated carbon, carbon black and polytetrafluoroethylene emulsion according to the mass ratio of 65:30:5, adjust it into a slurry, and evenly coat it on the foamed nickel, use a powder tablet press with 15MPa Press the electrode sheet into a sheet, and then put the electrode sheet into a vacuum drying oven at 120°C for 24 hours to vacuum dry. The saturated ca...

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Abstract

The invention relates to a preparation method of a semi-spherical active carbon electrode material of a super capacitor, which comprises the steps of: 1, dissolving glucose into deionized water, adding a foaming agent, after completely dissolving and fully mixing, transferring to a high-pressure kettle, and hydrothermally reacting at a temperature of 90-160 DEG C for 5-9h, wherein the mass ratio of the glucose to the foaming agent is 10:1-5; and washing a product, filtering and drying for carbonizing at a temperature of 700-850 DEG C for 3-5h under the protection of a reducing atmosphere, naturally cooling and then grinding to obtain semi-spherical active carbon. The invention has the advantages of simple steps, mild reaction conditions, increased pore diameter of the semi-spherical active carbon material, improved migration property of electrolyte ions and capability of effectively improving the power density of the super capacitor.

Description

technical field [0001] The invention relates to a preparation method of an electrode material, in particular to a preparation method of a hemispherical activated carbon electrode material for a supercapacitor. Background technique [0002] Supercapacitor is a new type of energy storage element between batteries and traditional capacitors. It has the characteristics of large capacity, high power density and long cycle life. It has a wide range of applications in electric vehicles, consumer electronics, energy and power, transportation, aerospace and other fields. [0003] Activated carbon materials are the core materials of carbon-based supercapacitors. Its energy storage mechanism is that the charge is stored in the electric double layer formed between the electrode and the electrolyte interface, and the energy is stored by electrostatic charge. Activated carbon as a capacitor electrode material is mainly based on its porous characteristics. The pore structure of activated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042
CPCY02E60/13
Inventor 邓梅根陈英放冯义红方勤
Owner JIANGXI UNIVERSITY OF FINANCE AND ECONOMICS
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