Full-pseudocapacitance super capacitor

A technology for supercapacitors and pseudocapacitors, applied in hybrid capacitor electrodes, hybrid capacitor collectors, etc., can solve the problems of insufficient specific capacity of supercapacitors, achieve multi-charge storage and release capacity, simple preparation method, and low cost

Active Publication Date: 2014-07-02
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 full pseudocapacitance supercapacitor for the problem of insufficient specific capacity of the existing supercapacitor

Method used

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  • Full-pseudocapacitance super capacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Preparation of multi-walled carbon nanotube / conductive carbon cloth substrate. The preparation method includes: adding 7.25 grams of nickel nitrate hexahydrate to 50 milliliters of a mixed solution of ethylene glycol and ethanol with a volume ratio of 1:1, and stirring for 20 minutes to Completely dissolve, put the solution into a spray bottle; spray the above solution evenly on the surface of the conductive carbon cloth until the conductive carbon cloth is wet, put it in the middle of the quartz tube in the tube furnace, and mix ethanol and ethyl alcohol with a volume ratio of 3:7 The diol mixture is placed on the inner edge of the furnace wall at one end of the quartz tube inlet; the tube furnace heats up, feeds 150sccm hydrogen and 50sccm argon at the same time, reaches 850 degrees Celsius and closes the hydrogen, and maintains it for 30 minutes until ethanol and ethylene diol After the alcohol mixed solution is completely volatilized, the temperature is naturally...

Embodiment 2

[0035] (1) Preparation of multi-walled carbon nanotube / conductive carbon cloth substrate. The preparation method includes: adding 3 grams of nickel nitrate hexahydrate into a mixed solution of 50 ml of ethylene glycol and ethanol, stirring until completely dissolved, and putting the solution into a spray bottle; the above solution is evenly sprayed on the surface of the conductive carbon cloth, and after the conductive carbon cloth is wet, it is placed in the middle of the quartz tube in the tube furnace, and the mixed solution of ethanol and ethylene glycol with a volume ratio of 1:5 is placed in the quartz tube At the inner edge of the furnace wall at one end of the air inlet; the tube furnace is heated up, and 150sccm hydrogen and 50sccm argon are introduced at the same time, and the hydrogen is turned off when it reaches 800 degrees Celsius, and the temperature is naturally cooled to 100 degrees Celsius after the ethanol and ethylene glycol mixture is completely volatilized....

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Abstract

The invention relates to a full-pseudocapacitance super capacitor. The full-pseudocapacitance super capacitor is composed of a positive electrode, a negative electrode, a diaphragm and electrolyte, wherein the diaphragm and the electrolyte are located between the positive electrode and the negative electrode. The full-pseudocapacitance super capacitor is characterized in that cobaltosic oxide (Co3O4) is attached to and grows on a multi-walled carbon nanotube / conductive carbon cloth substrate to form the positive electrode, ferric oxide (Fe2O3) is attached to and grows on a multi-walled carbon nanotube / conductive carbon cloth substrate to form the negative electrode, the diameter of multi-walled carbon nanotubes in the multi-walled carbon nanotube / conductive carbon cloth substrates ranges from 30 nanometers to 40 nanometers, and the multi-walled carbon nanotubes in the multi-walled carbon nanotube / conductive carbon cloth substrates are cross-linked and distributed in conductive carbon cloth space evenly and densely to show a three-dimensional net shape. Compared with a traditional carbon-based super capacitor, the full-pseudocapacitance super capacitor has higher pseudocapacitance specific capacity and good rate capability.

Description

technical field [0001] The invention relates to a full pseudocapacitance supercapacitor, which belongs to the field of supercapacitor preparation. 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 supercapacitors and pseudocapacitance supercapacitors. Electric double-layer capacitors use the electric double layer charge on the electrode surface to accumulate and store electricity. The reaction speed is fast, and the electricity can be accumulated and released instantaneously to generate large currents to drive high-power electrical appliances. ; Pseudocapacitive supercapacitors introduce surface or near-surface oxidation-reduction reactions on the positive or negative electrodes of supercapacitors to increase the capacity a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/68H01G11/30
CPCY02E60/13
Inventor 刘金平周程
Owner HUAZHONG NORMAL UNIV
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