Electrode plate for super capacitor and preparation method of electrode plate

A technology for supercapacitors and electrode sheets, applied in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, nanotechnology for materials and surface science, etc., can solve problems such as complex processes, high energy consumption, and high production costs. Achieve the effect of overcoming complex process, high specific surface area and low production cost

Active Publication Date: 2013-10-02
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an electrode sheet for a supercapacitor and a preparation method thereof. 2 The composition of the obtained mixture, wherein the mass percentage of nanoporous copper is 25% to 75%, overcomes the shortcomings of complex process, high energy consumption and high production cost in the prior art of manganese dioxide electrode material preparation method

Method used

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  • Electrode plate for super capacitor and preparation method of electrode plate
  • Electrode plate for super capacitor and preparation method of electrode plate
  • Electrode plate for super capacitor and preparation method of electrode plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The first step, the preparation of nanoporous copper by dealloying method

[0031] Take a Cu with a length of 8 cm, a thickness of 20 μm and a width of 2 mm 50 Zr 50 Amorphous metal thin strips are free to dealloy under 0.5M hydrofluoric acid for 15 minutes at room temperature to obtain nanoporous copper. After removing it, wash it with absolute ethanol, weigh it, and soak 0.0215g of nanoporous copper completely. in absolute ethanol;

[0032] figure 1 The scanning electron micrograph of the nanoporous copper prepared in this example shows the morphology of the prepared nanoporous copper. from figure 2 The energy spectrum analysis (EDS analysis) figure confirms that Cu 50 Zr 50 After the amorphous metal strip is dealloyed, there is only Cu element in the strip, which is nanoporous copper.

[0033] The second step is to prepare nanoporous copper and manganese dioxide mixed powder

[0034] 7.41mL of 0.1mol / L KMnO 4 The solution is dripped into the absolute ethano...

Embodiment 2

[0043] The first step, the preparation of nanoporous copper by dealloying method

[0044] Take a Cu with a length of 11 cm, a thickness of 20 μm and a width of 2 mm 50 Zr 50 Amorphous metal thin strips are free to dealloy under 0.5M hydrofluoric acid for 15 minutes at room temperature to obtain nanoporous copper. After removing it, wash it with absolute ethanol, weigh it, and soak 0.0478g of nanoporous copper completely. in absolute ethanol;

[0045] The second step is to prepare nanoporous copper and manganese dioxide mixed powder

[0046] 5.49mL of 0.1mol / L KMnO 4 The solution is dripped into the absolute ethanol completely immersed in the nanoporous copper obtained in the first step with a dropper, and the reaction equation is:

[0047] 4KMnO 4 +3CH 3 CH 2 OH=3CH 3 COOK+4MnO 2 ↓+KOH+4H 2 O,

[0048] Make the mass ratio=1:1 formed by the nanoporous copper and manganese dioxide formed, wherein the mass percentage of nanoporous copper is 50%, let stand for 3h, wash ...

Embodiment 3

[0054] The first step, the preparation of nanoporous copper by dealloying method

[0055] Take a Cu with a length of 14cm, a thickness of 20μm and a width of 2mm 50 Zr 50 Amorphous metal thin strips are free to dealloy under 0.5M hydrofluoric acid for 15 minutes at room temperature to obtain nanoporous copper. After removing it, wash it with absolute ethanol, weigh it, and soak 0.0624g of nanoporous copper completely. in absolute ethanol;

[0056] The second step is to prepare nanoporous copper and manganese dioxide mixed powder

[0057] 2.39mL of 0.1mol / L KMnO 4 The solution is dripped into the absolute ethanol completely immersed in the nanoporous copper obtained in the first step with a dropper, and the reaction equation is:

[0058] 4KMnO 4 +3CH 3 CH 2 OH=3CH 3 COOK+4MnO 2 ↓+KOH+4H 2 O,

[0059] Make the mass ratio=3:1 formed by the nanoporous copper and manganese dioxide formed, wherein the mass percentage of nanoporous copper is 75%, let stand for 3h, wash the...

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Abstract

The invention relates to an electrode plate for a super capacitor and a preparation method of the electrode plate, and relates to materials for electrode components of an electrochemical capacitor. The electrode plate is made of a compound applied and pressed on a nickel screen and capable of producing MnO<2> on the surface of nano porous copper, wherein the mass percent of nano porous copper is 25 to 75. The preparation method comprises the steps as follows: the nano porous copper is prepared by a dealloying method; then nano porous copper and manganese dioxide mixed powder is prepared; finally, dried nano porous copper and manganese dioxide mixed powder is mixed with binder polytetrafluoroethylene according to the mass ratio of 95 to 5, anhydrous ethyl alcohol is taken as a dispersing agent and ground for 10 min in an agate mortar to mix to be pasty, and then evenly coated on a nickel screen with the dimension of 30 mm* 10 mm, the electrode plate is formed by the pressing of the powder tablet machine under the pressure of 10 MPa, and then drying is performed until constant weight is obtained, so that the electrode plate for the super capacitor is prepared. The defects of complex process, high energy consumption and high manufacturing cost in the manganese dioxide electrode material preparation method in the prior art can be overcome.

Description

technical field [0001] The technical solution of the invention relates to the material of the electrode components of the electrolytic capacitor, specifically the electrode sheet for the supercapacitor and its preparation method. Background technique [0002] Nano-porous metal materials are attracting attention in the field of nano-technology and porous material science in recent years. The nano-pores are uniform, with large specific surface area, high porosity, high thermal conductivity, good corrosion resistance and excellent fatigue resistance. , opened up a new application field of porous metal, especially in the potential application of sensors, heat exchangers and catalytic materials, which has been highly valued by the international material science community. [0003] Supercapacitor is a new type of energy storage element. With its characteristics of large capacity, fast charging and discharging speed and long cycle life, it has broad application prospects in the fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86B82Y30/00
CPCY02E60/13
Inventor 秦春玲赵维民王志峰刘丽王丽娟
Owner HEBEI UNIV OF TECH
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