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Preparation method of flexible supercapacitor based on metal wires/cotton threads/polymer composite yarns

A supercapacitor and metal wire technology, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of complex carbon nanotube yarn preparation process, poor device weavable properties, and high cost of conductive substrates. The effect of reducing transmission resistance, low price, and increasing conductivity

Active Publication Date: 2018-06-01
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Li et al. loaded Co-Al LDH nanoarrays on cotton cloth and assembled asymmetric supercapacitor devices (Nature Communications, 2015, 7, 11586), and obtained a large specific energy density, while the weavable characteristics of the devices were relatively low. Poor; Wan et al used activated cotton thread as a substrate (Journal of PowerSources, 2016, 327, 365-373), loaded carbon nanotubes and graphene gel to assemble a linear supercapacitor, but its conductivity is poor, and the specific capacitance of the device 97.73μF / cm
The patent application (201510698568.X) of our research group’s carbon nanotube yarn uses carbon nanotubes and metal wires to intertwine to greatly improve the conductivity of the current collector, but the cost of the conductive substrate is high, and carbon nanotubes The preparation process of bobbin yarn is relatively complicated

Method used

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  • Preparation method of flexible supercapacitor based on metal wires/cotton threads/polymer composite yarns
  • Preparation method of flexible supercapacitor based on metal wires/cotton threads/polymer composite yarns
  • Preparation method of flexible supercapacitor based on metal wires/cotton threads/polymer composite yarns

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Embodiment 1

[0039] Embodiment 1 A method for preparing a flexible supercapacitor based on metal wire / cotton thread / polymer composite yarn, comprising the following steps in turn:

[0040] (1) Prepare steel wire / cotton composite yarn (SS / Cotton) by ring spinning method:

[0041] The mass ratio of raw steel wire / cotton thread is 10g:100g, the carbon content of the steel wire is 0.08%, the diameter is 6 microns, the cotton thread is pure cotton, and the diameter is 8 microns; the linear density of the obtained composite yarn is 50tex;

[0042] (2) Get two SS / Cotton composite yarns with a length of 1 cm and put them into the mixed solution of dimethyl sulfoxide, fluorocarbon surfactant, PEDOT:PSS and water and soak them for 1 minute, take them out, rinse them with deionized water, And vacuum-dried at 60°C for 6 hours to obtain SS / Cotton-PEDOT:PSS composite yarns applied to supercapacitors, and their resistivity is 760Ω / cm; wherein dimethyl sulfoxide, fluorocarbon surfactant, PEDOT : The mass...

Embodiment 2

[0046] Embodiment 2 A method for preparing a flexible supercapacitor based on metal wire / cotton thread / polymer composite yarn, comprising the following steps in turn:

[0047] (1) Prepare steel wire / cotton composite yarn (SS / Cotton) by ring spinning method:

[0048] The mass ratio of raw material steel wire / cotton thread is 5g:100g, the carbon content of steel wire is 0.08%, and diameter is 10 microns, and cotton thread is all cotton, and diameter is 15 microns; Gained composite yarn linear density is 50tex;

[0049] (2) Get a length of 1 cm and another SS / Cotton composite yarn with a length of 2 cm and put them into the mixed solution of dimethyl sulfoxide, fluorocarbon surfactant, PEDOT:PSS and water for 5 Take it out in minutes, rinse it with deionized water, and dry it under vacuum at 60°C for 6 hours to obtain two SS / Cotton-PEDOT:PSS composite yarns for supercapacitors; dimethyl sulfoxide, fluorocarbon surfactant , The mass ratio of PEDOT:PSS to water is 1.5g:7g:3g:98.5g...

Embodiment 3

[0054] Embodiment 3 A method for preparing a flexible supercapacitor based on metal wire / cotton thread / polymer composite yarn, comprising the following steps in turn:

[0055] (1) Prepare steel wire / cotton composite yarn (SS / Cotton) by ring spinning method:

[0056] The mass ratio of raw material steel wire / cotton thread is 25g:100g, the carbon content of steel wire is 0.08%, and diameter is 6 microns, and cotton thread is all cotton, and diameter is 15 microns; Gained composite yarn linear density is 50tex;

[0057] (2) Take a length of 1 cm and another SS / Cotton composite yarn with a length of 4 cm and put them into the mixed solution of dimethyl sulfoxide, fluorocarbon surfactant, PEDOT:PSS and water for 5 Take it out in minutes, rinse it with deionized water, and dry it in vacuum at 60°C for 6 hours to obtain the SS / Cotton-PEDOT:PSS composite yarn used in supercapacitors; wherein dimethyl sulfoxide, fluorocarbon surfactant, PEDOT: The mass ratio of PSS to water is 1.5g:7g...

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Abstract

The invention belongs to the technical field of preparation of capacitors, and specifically discloses a preparation method of a flexible supercapacitor based on metal wires / cotton threads / polymer composite yarns. The surface of the supercapacitor includes the metal wires, the cotton threads and conductive polymers. The preparation process includes: performing blending on the metal wires and the cotton threads to obtain metal wire / cotton thread composite yarns, and then dipping the composite yarns into a PEDOT:PSS solution; by respectively regarding the dipped composite yarns, Ag / AgCl and platinum sheets as work electrodes, reference electrodes and counter electrodes, performing electrochemical deposition in a pyrrole solution to enable the surface thereof to form polypyrrole, and obtainingyarn-shaped combined electrodes through washing and drying; and winding the two yarn-shaped combined electrodes to assemble a linear supercapacitor. According to the preparation method, the operationis simple, the capacitor has high flexibility and knittability, multiple supercapacitors can be connected in series and in parallel to respectively improve the voltage and the current, the process issimple, and the industrial production is easy.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to a method for preparing a flexible supercapacitor based on steel wire / cotton thread / polymer composite yarn. Background technique [0002] In recent years, supercapacitors as energy storage devices have attracted extensive attention due to their high specific capacity and power density. In order to meet the development needs of portable and textile electronic devices, it is necessary to develop supercapacitors with high flexibility and high energy density. Linear flexible supercapacitors have been favored by people in recent years due to their high flexibility, light weight and weavable properties. Currently, various types of linear supercapacitors have been reported, including graphene oxide fibers, carbon nanotube yarns, metal wires, carbon fibers, etc. Most of the above electrode preparations have certain defects, such as the high cost of dry-spun CNT yarns, the low co...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/30H01G11/24
CPCY02E60/13H01G11/86H01G11/24H01G11/30
Inventor 王秋凡马芸张道洪苗孟河李婷张俊珩程娟张爱清
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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