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Electrode material of porous charcoal super capacitor and preparation method thereof

A technology for supercapacitors and electrode materials, applied in the manufacture of capacitors, hybrid/electric double-layer capacitors, electrolytic capacitors, etc., to achieve the effects of high energy density and power density, simple preparation process and low carbonization temperature

Inactive Publication Date: 2010-05-19
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no literature reports or patents on the preparation of supercapacitor electrode materials using zinc chloride as a template and catalyst and fructose as a carbon source.

Method used

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  • Electrode material of porous charcoal super capacitor and preparation method thereof
  • Electrode material of porous charcoal super capacitor and preparation method thereof
  • Electrode material of porous charcoal super capacitor and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Dissolve 9 grams of fructose and 34 grams of zinc chloride in 35 milliliters of deionized water, stir in an oil bath at 85°C for 3 hours, then put them in an oven at 120°C for 4 hours. Then carbonization was carried out at 450° C. for 2 hours under the protection of argon, and the heating rate was 5° C. / min. Wash with 500 ml of hydrochloric acid and 500 ml of boiling water, and dry under vacuum at 100°C for 24 hours. The scanning electron microscope image of the porous carbon thus obtained is shown in figure 2 As shown, the particle size of the porous carbon is 2-30nm. Nitrogen adsorption analysis test shows that the specific surface area of ​​porous carbon is 1416m 2 / g; pore volume 0.95cm 3 / g, has two kinds of pores, mesopore and micropore, the diameter of mesopore is 2.02nm, and the diameter of micropore is 0.44nm. The capacitance test of this electrode material in the electrolyte of 1M KOH shows that ( image 3 ), at 0.1Ag -1 Under the current density, the m...

Embodiment 2

[0018] The difference between embodiment 2 and embodiment 1 is that the carbonization temperature is different, and the others are the same. details as follows:

[0019] Dissolve 9 grams of fructose and 56 grams of zinc chloride in 35 milliliters of deionized water, stir in an oil bath at 85°C for 3 hours, then put them in an oven at 130°C for 1 hour. Then carbonization was carried out at 700°C for 3 hours under the protection of argon with a heating rate of 5°C / min. Wash with 500 ml of hydrochloric acid and 500 ml of boiling water, and dry under vacuum at 100°C for 24 hours. The scanning electron microscope image of the porous carbon thus obtained is shown in Figure 4 As shown, the particle size of the porous carbon is uniform, the shape is regular, and the particle size is 2-30nm. Nitrogen adsorption analysis test shows that the specific surface area of ​​porous carbon is 1323m 2 / g, pore volume 2.04cm 3 / g, with mesopores and micropores, the mesopore diameter is 3.88n...

Embodiment 3

[0021] Dissolve 2 grams of fructose and 80 grams of zinc chloride in 60 milliliters of deionized water, stir in an oil bath at 85°C for 3 hours, and then put them in an oven at 130°C for 5 hours. Then carbonization was carried out at 750° C. for 2 hours under the protection of argon, and the heating rate was 5° C. / min. Wash with 500 ml of hydrochloric acid and 500 ml of boiling water, and dry under vacuum at 100°C for 24 hours. The particle size of the porous carbon is uniform, the shape is regular, and the particle size is 7-40nm. When the current density is 1Ag-1, the specific capacitance of porous carbon can reach 210F / g.

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Abstract

An electrode material of porous charcoal super capacitor and a preparation method thereof belong to the field of electrochemistry and new energy materials. The electrode material of porous charcoal super capacitor is prepared by using zinc chloride as template agent and catalyzer, using fructose as progenitor, solving the fructose and zinc chloride having a weight ratio of 50:1 to 1:99 in deionized water, stirring in oil bath at 10 to 300 DEG C, putting into an oven at 20 to 200 DEG C for 1 to 50 hours, roasting under the protection of argon, nitrogen or helium, heating with a temperature rate being 1 to 20 DEG C per minute, charring at 450 to 1200 DEG C, keeping temperature for 0.5 to 5 hours, washing with hydrochloric acid and water till no chloride ion exists tested by using silver nitrate, and then drying. The preparation process of the electrode material is simple, low-cost and fit for industrializing production.

Description

technical field [0001] The invention belongs to the field of electrochemistry and new energy materials, and in particular provides a porous carbon electrode material and a preparation method thereof. Background technique [0002] With the continuous expansion of the information society and the emergence of environmental and energy crises, the issue of energy storage and conversion efficiency has become more and more important. In various energy conversion systems, supercapacitors are used in backup power supplies, start-up power supplies, pulse power supplies, power grids, etc. areas of balance. High-power supercapacitors are particularly important for the start, acceleration and uphill driving of electric vehicles; at the same time, they can also be used in conjunction with nickel-metal hydride batteries, lithium-ion batteries, and fuel cells to improve the efficiency and service life of the hybrid power system. When the car starts and climbs a slope, it quickly provides ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/058H01G11/86
CPCY02E60/13
Inventor 范丽珍韩凌王寻冯玉川陈婷
Owner UNIV OF SCI & TECH BEIJING
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