High-performance carbon-based substrate for supercapacitor and preparation method thereof

A supercapacitor, high-performance technology, applied in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, carbon fiber, etc., can solve the problems of reducing AC impedance, increasing specific capacity, etc., reducing impedance and increasing confusion , the effect of improving electrochemical performance

Active Publication Date: 2019-09-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the substrate carrier, the carrier with excellent performance can greatly promote the superelectric performance of the load material, reduce its AC impedance and increase the specific capacity. However, the current research on the preparation of high-performance substrate materials by processing the carrier materials less

Method used

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  • High-performance carbon-based substrate for supercapacitor and preparation method thereof
  • High-performance carbon-based substrate for supercapacitor and preparation method thereof
  • High-performance carbon-based substrate for supercapacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Cut the carbon cloth material to a size of 1cm 2 ; Then soak the cut carbon cloth in absolute ethanol for 15 minutes, and then wash it with deionized water; finally, place the cleaned substrate in a constant temperature drying oven for 10 hours at a constant temperature of 60°C.

[0042] 2) Arrange the carbon in a tube furnace with a heating rate of 2°C / min, and treat it at 400°C for 5 hours. The whole process is carried out under the protection of oxygen, and the rate of feeding oxygen is 50mL / min.

[0043] 3) The oxidized carbon was soaked in aqua regia for 48 hours, washed repeatedly with deionized water, and then placed in an oven at 60° C. for constant temperature drying for 12 hours.

[0044] 4) The carbon after the aqua regia treatment is placed in the sodium borohydride solution containing aluminum trichloride and soaked for 1h, the concentration of sodium borohydride is 0.05mol / L, and the mass ratio of sodium borohydride and aluminum trichloride in the solut...

Embodiment 2

[0056] 1) Cut the carbon cloth material to a size of 1cm 2 ; Then soak the cut carbon cloth in absolute ethanol for 15 minutes, and then wash it with deionized water; finally, place the cleaned substrate in a constant temperature drying oven at 60°C for 8 hours.

[0057] 2) Arrange the carbon in a tube furnace with a heating rate of 2°C / min, and treat it at 400°C for 5 hours. The whole process is carried out under the protection of oxygen, and the rate of feeding oxygen is 40mL / min.

[0058] 3) The oxidized carbon was soaked in aqua regia for 24 hours, washed with deionized water, and placed in an oven at 60° C. for constant temperature drying for 12 hours.

[0059] 4) The carbon after the aqua regia treatment is placed in the sodium borohydride solution containing aluminum trichloride and soaked for 1h, the concentration of sodium borohydride is 0.02mol / L, and the mass ratio of sodium borohydride and aluminum trichloride in the solution is 1:0.2; and then cleaned with deioni...

Embodiment 3

[0062] 1) Cut the carbon cloth material to a size of 1cm 2 ; Then soak the cut carbon cloth in absolute ethanol for 8 minutes, and then wash it with deionized water; finally, place the cleaned substrate in a constant temperature drying oven at 60°C for 12 hours.

[0063] 2) Arrange the carbon in a tube furnace with a heating rate of 2°C / min, and treat it at 500°C for 5 hours. The whole process is carried out under the protection of oxygen, and the rate of feeding oxygen is 50mL / min.

[0064] 3) The oxidized carbon was soaked in aqua regia for 60 hours, washed with deionized water, and then placed in an oven at 60° C. for constant temperature drying treatment for 10 hours.

[0065] 4) The carbon after the aqua regia treatment is placed in the sodium borohydride solution containing aluminum trichloride and soaked for 0.5h, the concentration of sodium borohydride is 0.01mol / L, and the mass ratio of sodium borohydride and aluminum trichloride in the solution is 1:1; then cleaned ...

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Abstract

The invention discloses a high-performance carbon-based substrate for a supercapacitor and a preparation method thereof. The preparation method comprises the following steps that (1), a carbon cloth is soaked with absolute ethyl alcohol, then washed with deionized water, and then drying is conducted at a constant temperature; (2), the carbon cloth is subjected to high temperature heating treatment, and the heating process is performed under oxygen protection; (3), the carbon cloth obtained after oxidation is placed in aqua regia for soaking, washed with deionized water and then subjected to constant temperature drying treatment; (4), then the cloth is soaked in an aluminum chloride-containing sodium borohydride solution, washed with deionized water under ultrasonication and then dried; (5), then the cloth is soaked in a potassium permanganate solution, washed under the acidic condition of hydrogen peroxide, washed with deionized water and then dried at a constant temperature to obtain a high-performance carbon-based substrate for the supercapacitor. Accordingly, the performance optimization of the carbon-based substrate can be achieved, and the optimized carbon-based substrate has the certain size of oxidized pore morphology, good electrochemical performance and high specific capacitance, and the specific volume is increased by 477.7% compared with non-oxidized blank sample.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to a high-performance carbon-based base material for supercapacitors and a preparation method thereof. [0002] technical background [0003] At present, energy storage and sustainable recycling are major issues and challenges facing the world today. As an important energy storage device, supercapacitors are green, environmentally friendly, short charging time, high power density, good cycle performance, and long service life. Long and other advantages have become a research hotspot in recent years. Supercapacitors are divided into electric double layer capacitors, pseudocapacitors and hybrid capacitors according to different energy storage forms; since the main components of supercapacitors are electrode materials, electrolytes, etc., during the research process, most researchers focus on Research in the fields of electrode materials, electrolytes, and separator...

Claims

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Application Information

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IPC IPC(8): D06M11/50D06M11/13D06M11/64D06M11/17D06M11/80D06M10/00D06M10/06H01G11/40H01G11/24H01G11/86D06M101/40
CPCD06M10/00D06M10/06D06M11/13D06M11/17D06M11/50D06M11/64D06M11/80D06M2101/40H01G11/24H01G11/40H01G11/86Y02E60/13
Inventor 黄洪孙贤刘翠茵司徒粤陈炎丰徐佳杰
Owner SOUTH CHINA UNIV OF TECH
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