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Perfluorosulfonic acid resin/polyvinylidene fluoride composite electrospinning membrane and preparation method thereof

A technology of perfluorosulfonic acid resin and polyvinylidene fluoride, which is used in electrospinning, circuits, fuel cells, etc., can solve the problems of seasonal unstable power generation, continuous and stable power supply demand, environmental pollution, etc., and improve battery efficiency. , cost reduction, good mechanical properties

Active Publication Date: 2020-07-10
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid increase of fossil fuel consumption and the ensuing environmental pollution, there is an urgent need to develop and effectively utilize renewable energy such as wind energy, solar energy, and biomass, but these renewable energy sources are intermittent in nature, resulting in seasonal and the contradiction between unstable power generation and continuous and stable power supply demand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment describes the preparation method of electrospun membrane, comprising the following steps:

[0028] (1) Dissolve 2g of polyvinylidene fluoride resin in N,N-dimethylacetamide, dissolve under magnetic stirring conditions, and prepare a polyvinylidene fluoride resin solution with a mass percentage of 15%;

[0029] (2) ultrasonically treating the polyvinylidene fluoride resin solution obtained in step (1) for 1 hour to make the resin evenly dispersed and remove air bubbles;

[0030] (3) Add the polyvinylidene fluoride resin solution treated in step (2) into the syringe, set the distance between the needle and the receiver at room temperature to be 10 cm, the voltage to be 15 kV, and the advance speed of the syringe to be 0.5 ml / Hour;

[0031] (4) Then connect the positive pole of the high-voltage electrostatic generator to the needle, and the negative pole to the receiver. The receiver is covered with a layer of aluminum foil for receiving the electrospinni...

Embodiment 2

[0035] The difference from Example 1 is:

[0036] 1. In step (1), 2 g of polyvinylidene fluoride resin is dissolved in N,N-dimethylacetamide, dissolved in a magnetic stirrer, and a polyvinylidene fluoride resin solution with a mass percentage of 10% is prepared;

[0037] 2. The remaining steps are the same as in Example 1. In this embodiment, the obtained separator is smooth, evenly distributed, and free from delamination.

Embodiment 3

[0039] The difference from Example 1 is:

[0040] 1. Step (5) Soak the polyvinylidene fluoride spun membrane obtained in step (4) in a perfluorosulfonic acid resin with a concentration of 10 wt.%, then dry it to form a film, and soak it 5 times.

[0041] 2. The remaining steps are the same as in Example 1. In this embodiment, the obtained separator is smooth, evenly distributed, and free from delamination.

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Abstract

The invention discloses a perfluorosulfonic acid resin / polyvinylidene fluoride composite electrospinning membrane and a preparation method thereof, and belongs to the technical field of all-vanadium redox flow battery (VRFB) diaphragms. The method comprises the following steps of preparing a polyvinylidene fluoride resin spinning film by adopting electrostatic spinning, soaking the obtained polyvinylidene fluoride resin spinning film in an ethanol solution of perfluorosulfonic acid resin with the concentration of 3%-20% by weight, drying to form a film, and repeating the soaking-drying processfor 3-10 times to obtain the polyvinylidene fluoride fiber membrane. The composite electrospinning membrane prepared by the invention has good vanadium resistance, mechanical properties and electrical conductivity, so that the VRFB has good battery performance, and a new idea is provided for the development of the all-vanadium redox flow battery diaphragms.

Description

technical field [0001] The invention relates to the technical field of all-vanadium redox flow battery (VRFB) battery diaphragms, in particular to a perfluorosulfonic acid resin / polyvinylidene fluoride composite electrospun membrane and a preparation method thereof. Background technique [0002] With the rapid increase of fossil fuel consumption and the ensuing environmental pollution, there is an urgent need to develop and effectively utilize renewable energy sources such as wind energy, solar energy, and biomass, but these renewable energy sources are intermittent in nature, resulting in seasonal And the contradiction between unstable power generation and continuous and stable power supply demand. Therefore, energy storage devices including batteries are essential for a stable power supply. An ideal energy storage technology requires low cost, environmental protection, long life, high performance, and high energy density. Flow redox batteries (RFBs) have shown excellent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/00D06N3/12D04H1/4318D04H1/728D01D5/00H01M8/1039H01M8/1053H01M8/1069H01M8/1086H01M8/18
CPCD01D5/003D01D5/0061D01D5/0069D04H1/4318D04H1/728D06N3/0011D06N3/0015D06N3/0077D06N3/12D06N2201/0236D06N2209/041H01M8/1039H01M8/1053H01M8/1069H01M8/1086H01M8/188Y02E60/50
Inventor 刘建国张登华徐泽宇赵丽娜严川伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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