ZnS-FeCo2S4/porous carbon fiber flexible supercapacitor electrode material and preparation thereof

A technology of porous carbon fiber and supercapacitor, which is used in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of low capacitance and low energy density, and achieve the goal of increasing specific capacity, increasing specific surface area, and improving practical effects. Effect

Inactive Publication Date: 2021-03-09
郭绍香
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical defects of low specific capacitance and low energy density of existing flexible supercapacitors, the present invention provides a ZnS-FeCo 2 S 4 / Porous carbon fiber flexible supercapacitor electrode material and its preparation and preparation method

Method used

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  • ZnS-FeCo2S4/porous carbon fiber flexible supercapacitor electrode material and preparation thereof
  • ZnS-FeCo2S4/porous carbon fiber flexible supercapacitor electrode material and preparation thereof
  • ZnS-FeCo2S4/porous carbon fiber flexible supercapacitor electrode material and preparation thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Step 1: Add 1 g of polyacrylonitrile to 9.6 ml of dimethylacetamide and sonicate for 8 min, then add 0.1 g of polymethyl methacrylate to the solution, and then stir in a water bath at 50° C. for 16 h to obtain a spinning solution; then put The spinning solution was transferred to the syringe, and the fibers were spun horizontally on the electrospinning device; then the obtained fiber membrane was dried in a vacuum oven at 55 °C for 30 h; after drying, it was pre-oxidized at 280 °C for 2 h, and then The product was carbonized at 1300°C for 2 hours under a nitrogen atmosphere to obtain porous carbon nanofibers.

[0029] Step 2: 0.57g of Fe(NO 3 ) 3 9H 2O, 0.82g of Co(NO 3 ) 2 ·6H 2 O, 0.51g of urea and 0.26g of NH 4 Dissolve F in 57ml of deionized water, stir at room temperature for 20min, add 0.8g of the porous nano-carbon fiber prepared in step 1 to the mixed solution, and continue stirring for 15min; then transfer the solution to a reaction kettle and react at 13...

Embodiment 2

[0032] Step 1: Add 1.5g of polyacrylonitrile to 14.4ml of dimethylacetamide and sonicate for 10min, then add 0.12g of polymethyl methacrylate to the solution, and then stir in a water bath at 50°C for 12h to obtain a spinning solution; then Transfer the spinning solution to the syringe, and spin the fiber horizontally on the electrospinning device; then put the obtained fiber film in a vacuum oven at 60°C for 24h; after drying, pre-oxidize at 290°C for 1h, and then The product was carbonized at 1300° C. for 2 h under a nitrogen atmosphere to obtain porous carbon nanofibers.

[0033] Step 2: 0.72g of Fe(NO 3 ) 3 9H 2 O, 1.04g of Co(NO 3 ) 2 ·6H 2 O, 0.54g of urea and 0.26g of NH 4 Dissolve F in 72ml of deionized water, stir at room temperature for 30 minutes, add 1.2 g of porous nano-carbon fibers prepared in step 1 to the mixed solution, and continue stirring for 20 minutes; then transfer the solution to a reaction kettle and react for 28 hours at a temperature of 120°C....

Embodiment 3

[0036] Step 1: Add 1.4 g of polyacrylonitrile to 13.4 ml of dimethylacetamide and sonicate for 9 minutes, then add 0.14 g of polymethyl methacrylate to the solution, and then stir in a water bath at 50° C. for 15 hours to obtain a spinning solution; then The spinning solution was transferred to a syringe, and the fibers were spun horizontally on the electrospinning device; then the obtained fiber membrane was dried in a vacuum oven at 57 °C for 28 h; after drying, it was pre-oxidized at 285 °C for 1 h, and then The product was carbonized at 1300° C. for 2 h under a nitrogen atmosphere to obtain porous carbon nanofibers.

[0037] Step 2: 0.8g of Fe(NO 3 ) 3 9H 2 O, 1.15g of Co(NO 3 ) 2 ·6H 2 O, 0.71g of urea and 0.37g of NH 4 Dissolve F in 80ml of deionized water, stir at room temperature for 22min, add 1.12g of the porous nano-carbon fiber prepared in step 1 to the mixed solution, and continue stirring for 18min; then transfer the solution to a reaction kettle and react ...

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Abstract

The invention belongs to the technical field of supercapacitors, and particularly relates to a ZnS-FeCo2S4/porous carbon fiber flexible supercapacitor electrode material and a preparation method thereof. The preparation method comprises the steps: taking a dimethylacetamide solution of polyacrylonitrile as a raw material, adding polymethyl methacrylate for pore forming, preparing a fibrous membrane through an electrostatic spinning device, and preparing the porous carbon nanofibers through pre-oxidation and carbonization; employing substances such as Fe (NO3)3.9H2O, urea and Co(NO3)2.6H2O forgrowing FeCo2S4 on the surface of the carbon fiber; and then soaking the sample into zinc sulfate and a Na2S.9H2O solution to prepare the ZnS-FeCo2S4/porous carbon fiber electrode material. Accordingto the ZnS-FeCo2S4/porous carbon fiber flexible supercapacitor electrode material, the specific capacitance is effectively improved, and the energy density of a capacitor is increased.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, in particular to a ZnS-FeCo 2 S 4 / Porous carbon fiber flexible supercapacitor electrode material and its preparation. Background technique [0002] A supercapacitor is an energy storage device whose performance is between that of a flat panel capacitor and a battery. In addition to its extremely high power density, it also has the advantages of fast charge and discharge, long cycle life, and safety. According to the difference in energy storage mechanism, it can be divided into electric double layer capacitor and pseudocapacitive capacitor. The energy storage of electric double layer capacitors is mainly derived from the separation of anions and cations in the electrolyte at the interface between the electrode material and the electrolyte to form an electric double layer; the pseudocapacitive capacitor is mainly due to the faradaic redox reaction that occurs on the surface of the elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/26H01G11/38
CPCH01G11/26H01G11/38H01G11/86Y02E60/13
Inventor 郭绍香马光伟
Owner 郭绍香
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