Activated carbon fiber for supercapacitor and preparation method thereof

A technology of activated carbon fibers and supercapacitors, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of cycle stability that needs to be further improved, obstacles to practical applications, and low conductivity of transition metal oxide materials. Achieve excellent cycle stability and electrochemical rate performance, low raw material cost, regular shape

Active Publication Date: 2017-08-22
JIANGSU SUTONG CARBON FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low conductivity of transition metal oxide materials, the charge-discharge characteristics and cycle stability under high current need to be further improved, and these shortcomings hinder their practical application in the field of electrochemistry.

Method used

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  • Activated carbon fiber for supercapacitor and preparation method thereof
  • Activated carbon fiber for supercapacitor and preparation method thereof
  • Activated carbon fiber for supercapacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] First, the activated carbon fibers were treated with 20ml of concentrated sulfuric acid at 50°C for 12 hours, then washed with a large amount of distilled water until neutral; then the activated carbon fibers were cleaned with ethanol, acetone and deionized water, and dried for later use; the concentration of 0.005mol / L was prepared. Mn(CH 3 COO) 2 and 0.01 mol / L CH 3 COONH 4 solution, then add 5% volume of DMSO, and mix the solution evenly; then immerse the above treated activated carbon fiber in the precursor solution, at 0.5 mA / cm 2 It was deposited under the electrochemical deposition conditions for 60 minutes, and it can be observed that the surface of the activated carbon fiber is gradually covered by a layer of brown substance; Calcined at 200°C for 2h in a Furnace to obtain the product. Using an electrochemical workstation under the 1V potential window, at Na 2 SO 4 The electrochemical performance test is carried out on the product prepared by the present ...

Embodiment 2

[0040] Firstly, the activated carbon fibers were treated with 30ml of concentrated sulfuric acid at 25°C for 15 hours, and then washed with a large amount of distilled water until neutral; then the activated carbon fibers were cleaned with ethanol, acetone and deionized water, and dried for later use; the concentration of 0.01mol / L was prepared. Mn(CH 3 COO) 2 and 0.005 mol / L CH 3 COONH 4 solution, then add 8% volume of DMSO, and mix the solution evenly; then immerse the above-mentioned treated activated carbon fiber in the precursor solution, at 0.6 mA / cm 2 It was deposited under the electrochemical deposition conditions for 120min, and it can be observed that the surface of the activated carbon fiber is gradually covered by a layer of brown substance; Calcined at 250°C for 3 hours in a Furnace to obtain the product. Using an electrochemical workstation under the 1V potential window, at Na 2 SO 4 The electrochemical performance test is carried out on the product prepare...

Embodiment 3

[0042] First, treat the activated carbon fiber with 20ml of concentrated sulfuric acid at 80°C for 24 hours, then wash it with a large amount of distilled water until it is neutral; then use ethanol, acetone and deionized water to clean the activated carbon fiber, dry it for later use; configure the concentration of 0.1mol / L Mn(CH 3 COO) 2 and 0.02 mol / L CH 3 COONH 4 Solution, then add 25% volume of DMSO, mix the solution evenly; then immerse the above treated activated carbon fiber in the precursor solution, at 5 mA / cm 2 It was deposited under the electrochemical deposition conditions for 120min, and it can be observed that the surface of the activated carbon fiber is gradually covered by a layer of brown substance; Calcined at 300°C for 2h in a Furnace to obtain the product. Using an electrochemical workstation under the 1V potential window, at Na 2 SO 4 The electrochemical performance test is carried out on the product prepared by the present invention in the solution...

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Abstract

The invention discloses an activated carbon fiber used for a supercapacitor and a preparation method thereof, comprising: (1) using concentrated sulfuric acid to carry out hydrophilic finishing on the activated carbon fiber; (2) sequentially washing the activated carbon fiber with ethanol, acetone and deionized water (3) Prepare manganese acetate solution and ammonium acetate solution, then add dimethyl sulfoxide solution and mix evenly to obtain a precursor solution; (4) Immerse the activated carbon fiber in step (2) in the precursor solution, and use electric Manganese dioxide nanomaterials are deposited on the surface of activated carbon fibers by chemical deposition; (5) After the reaction is completed, the products are washed with ethanol and deionized water, dried, and calcined to obtain the product. The process of the invention is simple, economical and high in production efficiency; needle-like manganese dioxide nano-arrays can be obtained, which are uniformly distributed radially on the surface of activated carbon fibers, and can be prepared in a large area without templates; and have excellent electrochemical properties, and have great application prospects broad.

Description

technical field [0001] The invention relates to a preparation method of activated carbon fibers used in supercapacitors. Background technique [0002] Supercapacitor is a new type of energy storage device with energy density and power density between traditional capacitors and batteries. It has the advantages of high power density, high current resistance, good charge and discharge performance, long cycle charge and discharge life, and wide operating temperature range. . At present, the electrode materials widely used in supercapacitors include porous carbon materials, transition metal oxides and conductive polymer materials. Compared with powdered activated carbon, activated carbon fibers (ACFs) have a larger specific surface area. Not only that, ACFs also have the advantages of easy processing and low density, which are beneficial to improve the performance of electrochemical capacitors. , which also shows that ACFs is an ideal electrode material for the preparation of e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/40H01G11/46
CPCY02E60/13
Inventor 陈植民李文尧葛元宇于德成钱薇薇
Owner JIANGSU SUTONG CARBON FIBER
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