Integrated composite electrode for supercapacitor and preparation method of integrated composite electrode

A technology of supercapacitors and composite electrodes, applied in the field of capacitors, can solve the problems of short diffusion distance and low capacitance, and achieve the effects of improving contact interface, uniform growth and firm load

Inactive Publication Date: 2016-04-06
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the poor conductivity of the metal oxide itself and the short diffusion distance (~20nm) of the electrolyte on the electrode, the measured capacitance is low

Method used

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  • Integrated composite electrode for supercapacitor and preparation method of integrated composite electrode
  • Integrated composite electrode for supercapacitor and preparation method of integrated composite electrode
  • Integrated composite electrode for supercapacitor and preparation method of integrated composite electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Cut the commercial carbon cloth into a certain size (such as 1x2cm 2 ), then place the cut carbon cloth in dilute hydrochloric acid and deionized water for ultrasonic cleaning for 15 minutes, air-dry naturally, and set aside;

[0019] (2) Add 15mL deionized water into the reaction kettle, weigh 1mmol Co(No 3 ) 2 ·6H 2 O, 4 mmol NH 4 F, 5mmol urea, add deionized water under stirring until a transparent pink solution is formed, insert the prepared carbon cloth vertically and immerse it in the solution, seal the reaction kettle, raise the temperature of the reaction kettle to 100°C for 12 hours, and cool After reaching room temperature, the carbon cloth was taken out of the reaction kettle and placed in water and ethanol for ultrasonic cleaning several times, dried at 60 °C for 12 h, and then calcined at 300 °C for 2 h in an air atmosphere to grow Co on the surface of the carbon cloth. 3 o 4 nanowire arrays;

[0020] (3) Take 10 mL of deionized water and add it t...

Embodiment 2

[0022] (1) Cut the commercial carbon cloth into a certain size (such as 1x2cm 2 ), then place the cut carbon cloth in dilute hydrochloric acid and deionized water for ultrasonic cleaning for 15 minutes, air-dry naturally, and set aside;

[0023] (2) Add 15mL deionized water into the reaction kettle, weigh 1.2mmol Co(No 3 ) 2 ·6H 2 O, 5 mmol NH 4 F, 6mmol urea, add deionized water under stirring until a transparent pink solution is formed, insert the prepared carbon cloth vertically and immerse it in the solution, seal the reaction kettle, raise the temperature of the reaction kettle to 110°C for 10h, and cool After reaching room temperature, the carbon cloth was taken out of the reaction kettle and ultrasonically cleaned several times in water and ethanol respectively, dried at 60°C for 12 h, and then calcined at 320°C for 2 h in an air atmosphere to grow Co on the surface of the carbon cloth. 3 o 4 nanowire arrays;

[0024] (3) Take 10 mL of deionized water and add it t...

Embodiment 3

[0026] (1) Cut the commercial carbon cloth into a certain size (such as 1x2cm 2 ), then place the cut carbon cloth in dilute hydrochloric acid and deionized water for ultrasonic cleaning for 15 minutes, air-dry naturally, and set aside;

[0027] (2) Add 15mL deionized water into the reaction kettle, weigh 1.5mmol Co(No 3 ) 2 ·6H 2 O, 6 mmol NH 4 F, 7.5mmol urea, add deionized water under stirring until a transparent pink solution is formed, insert the prepared carbon cloth vertically and immerse it in the solution, seal the reaction kettle, raise the temperature of the reaction kettle to 120°C for 9 hours, After cooling to room temperature, the carbon cloth was taken out of the reaction kettle and ultrasonically cleaned several times in water and ethanol respectively, dried at 60 °C for 12 h, and then calcined at 350 °C for 2 h in an air atmosphere to grow Co on the surface of the carbon cloth. 3 o 4 nanowire arrays;

[0028] (3) Take 10 mL of deionized water and add it to...

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Abstract

The invention discloses an integrated composite electrode for a supercapacitor and a preparation method of the integrated composite electrode. The preparation method adopts a hydrothermal method and comprises the following steps of taking a carbon fabric as a conductive substrate, nickel acetate and ammonium molybdate as a precursor for synthesizing nickel molybdate and urea as an accelerant and a morphology modulation agent of the nickel molybdate to prepare a Co3O4@NiMoO4 core-shell composite structured electrode, and the prepared electrode material can be directly used for the supercapacitor. In the Co3O4@NiMoO4 core-shell composite structured integral electrode prepared according to the method, an electrode substance is firmly loaded on the surface of the carbon fabric and uniformly grown, the specific area of the electrode in a BET test reaches 251m<2>/g, the electrode has excellent electrochemical activity, and the contact interface of electrode-electrolyte is greatly improved.

Description

technical field [0001] The invention relates to an electrode for a capacitor and a preparation method thereof, more specifically, to an integral composite electrode for a supercapacitor and a preparation method thereof, belonging to the technical field of capacitors. Background technique [0002] As a new type of energy storage element, supercapacitors have the advantages of higher power, faster charging and discharging, longer life and lower maintenance costs compared with traditional physical capacitors and batteries, among which excellent electrode materials are the core. Current nickel molybdate NiMoO 4 As a new type of electrode material for supercapacitors, it has attracted increasing attention due to its high electrochemical activity, low cost, and environmental friendliness. [0003] Due to the poor conductivity of the metal oxide itself and the short diffusion distance (~20nm) of the electrolyte on the electrode, the measured capacitance is low. The electroactive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/36H01G11/86
CPCY02E60/13H01G11/36H01G11/86
Inventor 王辉简健明范云李永峰余林
Owner GUANGDONG UNIV OF TECH
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