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Flexible electrode material, preparation method thereof and flexible supercapacitor

A technology for supercapacitors and flexible electrodes, which is applied in the manufacture of hybrid/electric double layer capacitors and electrodes of hybrid capacitors, etc. It can solve the problems of poor stability and repeatability of electrode materials, many control variables, and low mechanical strength, and achieve good connectivity , increase the adsorption capacity, the effect of high specific surface area

Active Publication Date: 2020-05-19
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The specific capacitance of the flexible supercapacitor is 233F / g, but the mechanical strength is low, and there are many control variables in the preparation process, and the stability and repeatability of the prepared flexible supercapacitor electrode material are poor.

Method used

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  • Flexible electrode material, preparation method thereof and flexible supercapacitor
  • Flexible electrode material, preparation method thereof and flexible supercapacitor
  • Flexible electrode material, preparation method thereof and flexible supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] see Figure 1 to Figure 3 As shown, a flexible electrode material is prepared by the following method:

[0048] S1. Preparation of electrospinning solution: dissolve nylon 6 masterbatch in formic acid, and stir in a water bath heated at a constant temperature of 40°C to obtain a nylon 6 spinning solution with a mass concentration of 15%; The amide masterbatch is dissolved in a mixed solvent of formic acid and dichloromethane with a volume ratio of 3:2, and stirred in a water bath heated at a constant temperature of 40°C to obtain a copolyamide spinning solution with a mass concentration of 10%;

[0049] S2. Electrospinning: put the nylon 6 spinning solution and the copolyamide spinning solution into two different syringes respectively, use No. 22 nozzle as the nozzle, place the syringe in the pump and fix it for synchronous electrospinning, The spinning voltage is 20kv, the spinning distance is 20cm, and the extrusion speed is 0.015mm / min. The electrostatic nanofiber f...

Embodiment 2～6

[0060] The flexible electrode materials provided in Examples 2-6 are different from those in Example 1 in that the hot-pressing temperature is shown in Table 1, and the others are basically the same as those in Example 1, and will not be repeated here.

Embodiment 7～10 and comparative example 3

[0069] The flexible electrode materials provided in Examples 7 to 10 and Comparative Example 3, compared with Example 1, differ in that the concentrations of the copolyamide spinning solution and the nylon 6 spinning solution are as shown in Table 2, and the others are the same as those in Example 1. 1 are basically the same and will not be repeated here.

[0070] Preparation conditions and performance test results of Table 2 Examples 7-10 and Comparative Example 3

[0071]

[0072] It can be seen from Table 2 that with the increase of the concentration of the copolyamide spinning solution, the tensile strength and electrical conductivity of the nanofiber-based flexible electrode material first increase and then decrease. combine Image 6 It can be seen that when the concentration of the copolyamide spinning solution is too high, the diameter of the copolyamide becomes larger, and it is in a flat ribbon shape. After heat treatment, it is prone to adhesion and the specific ...

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Abstract

The invention provides a flexible electrode material, a preparation method thereof and a flexible supercapacitor. The method comprises the steps: selecting low-melting-point copolyamide and nylon 6 for synchronous electrostatic spinning to obtain a copolyamide / nylon 6 composite nanofiber membrane; then, carrying out hot-pressing treatment to melt the copolyamide to form bonding points so as to obtain a reinforced composite nanofiber membrane; and finally, growing polypyrrole on the reinforced composite nanofibers in an in-situ polymerization mode to obtain a flexible electrode material. The flexible supercapacitor is obtained by assembling the flexible electrode material with PVA-H3PO4 gel electrolyte. Through hot pressing treatment, the copolyamide fibers are melted to form bonding points, the reinforced composite nanofiber membrane with a multi-layer three-dimensional network structure is obtained, and the material is endowed with high conductivity through being compounded with the polypyrrole. The prepared flexible supercapacitor has the advantages of lightness, thinness, good flexibility, relatively high surface capacitance and energy density and the like, and is suitable for preparing a flexible wearable device.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor electrode materials, and in particular relates to a flexible electrode material, a preparation method thereof and a flexible supercapacitor. Background technique [0002] With the rapid development of the electronics industry, flexible electronic devices with portable and wearable characteristics are gradually entering people's lives. The research and development of energy storage devices with high capacity, small size and flexible characteristics that match it has become a research hotspot. As a new type of energy storage device, flexible solid-state supercapacitors not only have the characteristics of high capacity, fast charging and discharging, long cycle life, safety and environmental protection, but also have the advantages of lightness, thinness, toughness, and bendability. They have great potential in emerging electronic smart devices. Broad application prospects. [0003] At prese...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/48H01G11/86
CPCH01G11/24H01G11/30H01G11/48H01G11/86Y02E60/13
Inventor 韦炜汤清伦夏咏张如全邹汉涛
Owner WUHAN TEXTILE UNIV
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