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Flexible symmetrical pseudocapacitance super capacitor and preparation method thereof

A supercapacitor, symmetrical technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, hybrid capacitor collectors, etc., can solve the problems of distinguishing polarity, inconvenient use, etc., to increase the load capacity, fast Effect of charge and discharge, large pseudocapacitance specific capacity

Inactive Publication Date: 2015-11-11
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a flexible symmetrical pseudocapacitor supercapacitor capable of forward and reverse charge and discharge and its preparation method for the existing pseudocapacitor supercapacitors that need to distinguish polarity and are not convenient to use.

Method used

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  • Flexible symmetrical pseudocapacitance super capacitor and preparation method thereof
  • Flexible symmetrical pseudocapacitance super capacitor and preparation method thereof
  • Flexible symmetrical pseudocapacitance super capacitor and preparation method thereof

Examples

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Embodiment 1

[0033] Preparation of nano-nickel particles / multi-walled carbon nanotubes / conductive carbon cloth electrode, the preparation method includes: using an electrochemical workstation three-electrode system, using carbon fiber cloth as a working electrode, metal platinum sheet as a counter electrode, and calomel as a reference electrode . In a sulfuric acid solution of 1 mole per liter, it was polarized at a constant potential at a positive potential of 2.5 volts for 10 minutes, and the carbon fiber cloth was taken out and dried in an electric blast drying oven to obtain a treated hydrophilic conductive carbon cloth. 2.9 grams of nickel nitrate (Ni(NO 3 ) 2 ·6H 2O) dissolved in 50 ml of water (H 2 O) in the solution, stir with a magnetic stirrer to make it fully dissolve, mix evenly, and make a solution; cut out the treated conductive carbon cloth, place it in the prepared nickel nitrate solution for soaking, take it out, and dry it at 100 degrees Celsius 1 hour; under an inert...

Embodiment 2

[0040] The preparation of nano-nickel particles / multi-walled carbon nanotubes / conductive carbon cloth electrodes, the preparation method includes: in the electrochemical workstation three-electrode system, carbon fiber cloth is used as the working electrode, metal platinum sheet is used as the counter electrode, and calomel is used as the reference electrode . In a sulfuric acid solution of 2 moles per liter, use the constant potential polarization mode, and polarize at a positive potential of 3 volts for 5 minutes, take out the carbon fiber cloth and dry it in an electric blast drying oven to obtain the treated hydrophilic conductive carbon cloth . 1.5 grams of nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O) dissolved in 50 ml of water (H 2 O) in the solution, stir with a magnetic stirrer to make it fully dissolve, mix evenly, and make a solution; cut the conductive carbon cloth after the activation treatment and place it in the nickel nitrate solution that has been prepared for inf...

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Abstract

The invention relates to a flexible symmetrical pseudocapacitance super capacitor and a preparation method thereof. The flexible symmetrical pseudocapacitance super capacitor comprises a positive electrode, a negative electrode and electrolyte, wherein the electrolyte is arranged between the positive electrode and the negative electrode; the flexible symmetrical pseudocapacitance super capacitor is characterized in that with a nano nickel particle / multiwalled carbon nanotube / conductive carbon cloth electrode employing conductive carbon cloth as a current collector and a nano nickel particle / multiwalled carbon nanotube as an active material as the positive electrode and the negative electrode, the flexible symmetrical pseudocapacitance super capacitor is formed by growing the nano nickel particle on a multiwalled carbon nanotube / conductive carbon cloth base; and the nano nickel particle and the multiwalled carbon nanotube are combined in situ. The nano nickel particle / multiwalled carbon nanotube / conductive carbon cloth electrode has the advantages of high global electronic mobility and excellent rate capability; the pseudocapacitance super capacitor assembled by the nano nickel particle / multiwalled carbon nanotube / conductive carbon cloth electrode has a symmetrical structure, and is capable of charging and discharging in positive and negative directions without distinguishing of the polarity; compared with a traditional carbon-based super capacitor, relatively high specific capacity of pseudocapacitance can be provided; and the flexible symmetrical pseudocapacitance super capacitor has excellent mechanical flexibility.

Description

technical field [0001] The invention relates to a flexible symmetrical pseudocapacitance supercapacitor capable of positive and negative charging and discharging and a preparation method thereof, specifically, using porous network structure nano-nickel particles / multi-walled carbon nanotubes cross-linked on conductive carbon cloth as positive and negative electrodes, respectively. The negative electrode is assembled into a flexible solid pseudocapacitor supercapacitor that can be recharged and discharged. It belongs to the fields of electrochemistry, materials science, electronic instruments, energy, etc., and is mainly used in flexible and portable electronic devices. Background technique [0002] Supercapacitor is a new type of energy storage device between ordinary batteries and capacitors, which can provide higher power density than ordinary batteries and greater energy density than ordinary capacitors. Supercapacitors are further divided into electric double-layer supe...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/36H01G11/24H01G11/28H01G11/68H01G11/86H01G11/84
Inventor 周程刘金平邢文静徐孟旋曲君怡段苑林诏华金烁
Owner HUAZHONG NORMAL UNIV
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