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A nanofiber-based flexible array electrode and its preparation method

A nanofiber, array structure technology, applied in the field of electrochemical materials, can solve the problems of poor fastness, cumbersome and time-consuming growth process, uneven loading of ZnO seed crystals, etc., and achieves the effect of simple process, improved overall capacitance performance, and small size.

Active Publication Date: 2020-11-03
HEBEI NINGFANG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of uneven loading of ZnO seed crystals, poor fastness, and tedious and time-consuming growth process in the prior art when the surface is impregnated or coated with ZnO seed crystals, the present invention provides a nanofiber-based flexible array structure electrode

Method used

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  • A nanofiber-based flexible array electrode and its preparation method
  • A nanofiber-based flexible array electrode and its preparation method
  • A nanofiber-based flexible array electrode and its preparation method

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Embodiment 1

[0027] This embodiment provides a method for preparing a nanofiber-based flexible array structure electrode, including the following steps:

[0028] Step a, uniformly disperse polyacrylonitrile, purified terephthalic acid and acidified carbon nanotubes in 5mL of N,N-dimethylformamide, stir magnetically at a constant temperature at 60°C until the dispersion is uniform, and use it as the inner layer spinning solution, The concentration of polyacrylonitrile in the inner layer spinning solution is 6.0wt%, the concentration of purified terephthalic acid is 5.0wt%, and the concentration of acidified carbon nanotubes is 2.0wt%; Polyvinylpyrrolidone, zinc acetate and purified terephthalic acid Diformic acid is dispersed in 5mL of N, N-dimethylformamide, magnetically stirred at a constant temperature of 60°C until the dispersion is uniform, and used as the outer layer spinning solution. The concentration of polyvinylpyrrolidone in the outer layer spinning solution is 12wt%, zinc acetate...

Embodiment 2

[0034] This embodiment provides a method for preparing a nanofiber-based flexible array structure electrode, including the following steps:

[0035] Step a, uniformly disperse polyacrylonitrile, purified terephthalic acid and acidified carbon nanotubes in 8mL of N,N-dimethylformamide, stir magnetically at a constant temperature at 60°C until the dispersion is uniform, and use it as the inner layer spinning solution, The concentration of polyacrylonitrile in the inner layer spinning solution is 5.0wt%, the concentration of purified terephthalic acid is 5.0wt%, and the concentration of acidified carbon nanotubes is 0.5wt%; Polyvinylpyrrolidone, zinc acetate and purified terephthalic acid Diformic acid was dispersed in 10mL of N,N-dimethylformamide, stirred with a constant temperature magnetic force at 60°C until the dispersion was uniform, and used as the outer layer spinning solution. The concentration of polyvinylpyrrolidone in the outer layer spinning solution was 20.0wt%, ace...

Embodiment 3

[0041] This embodiment provides a method for preparing a nanofiber-based flexible array structure electrode, including the following steps:

[0042] Step a, uniformly disperse polyacrylonitrile, purified terephthalic acid and acidified carbon nanotubes in 6mL of N,N-dimethylformamide, stir magnetically at a constant temperature at 60°C until the dispersion is uniform, and use it as an inner layer spinning solution, The concentration of polyacrylonitrile in the inner layer spinning solution is 4.0wt%, the concentration of purified terephthalic acid is 3.0wt%, and the concentration of acidified carbon nanotubes is 1.5wt%; Polyvinylpyrrolidone, zinc acetate and purified terephthalic acid Diformic acid was dispersed in 5mL of N,N-dimethylformamide, stirred with a constant temperature magnetic force at 60°C until the dispersion was uniform, and used as the outer layer spinning solution. The concentration of polyvinylpyrrolidone in the outer layer spinning solution was 10.0wt%, aceti...

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Abstract

The invention relates to the technical field of electrochemical materials, in particular to a nanofiber-based flexible array structure electrode and a preparation method thereof. The nanofiber-based flexible array structure electrode is prepared from an inner layer spinning solution and an outer layer spinning solution through electrostatic spinning, carbonization, hydrothermal growth and electro-deposition, the inner layer spinning solution is prepared from polyacrylonitrile (PAN), purified terephthalic acid (PTA), acidized carbon nanotubes (AC-MWNTs) and a solvent, and the outer layer spinning solution is prepared from polyvinylpyrrolidone (PVP), inorganic zinc salt, PTA and a solvent. According to the preparation method of the nanofiber-based flexible array structure electrode, the flexibility of carbon fiber is improved, and ZnO can be directly added into a precursor in the coaxial spinning process, so that the outer surface of the carbon nanofiber is loaded with nano ZnO evenly and firmly, the seed crystal coating process is omitted, thus the method is simple, efficient, high in universality, low in cost and environmentally friendly, an obtained product integrates the flexiblecharacteristic and bimetallic pseudocapacitance performance, and can form an independent electrode.

Description

technical field [0001] The invention relates to the technical field of electrochemical materials, in particular to a nanofiber-based flexible array electrode and a preparation method thereof. Background technique [0002] In recent years, with the continuous development of science and technology, electronic devices have gradually become miniaturized, lightweight and flexible, such as flexible drives, distributed sensors, flexible displays and wearable multimedia devices. Therefore, it is necessary to develop flexible, lightweight, and portable high-performance energy storage devices to meet the requirements of wearable electronic devices in terms of thinness, impact resistance, high energy storage, and portability. Although the currently widely developed supercapacitors have many obvious advantages, such as fast charge and discharge rates, long cycle life, and wide operating temperature range, their shortcomings of large rigidity, heavy weight, and low energy density hinder ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/46H01G11/36H01G11/86D01F1/10D01F9/21D01F9/22
Inventor 李晓燕姚继明阎若思张维
Owner HEBEI NINGFANG GRP
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