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Nano carbon-doped porous fiber single electrode, membrane electrode and preparation method

A technology of porous fibers and nanofibers, which is applied in battery electrodes, nanotechnology, nanotechnology, etc., can solve the problems that the conductivity of nanofiber films needs to be improved, so as to increase the catalytic active area, improve the life of membrane electrodes, and increase conductivity. Effect

Inactive Publication Date: 2016-01-20
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conductivity of nanofiber films prepared by this method needs to be improved.

Method used

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  • Nano carbon-doped porous fiber single electrode, membrane electrode and preparation method
  • Nano carbon-doped porous fiber single electrode, membrane electrode and preparation method
  • Nano carbon-doped porous fiber single electrode, membrane electrode and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Weigh 0.5g of polyacrylonitrile (PAN) powder and 10g of N,N-dimethylformamide (DMF), mix them in a beaker, and stir at 60°C for 0.5h with a magnetic stirrer to form a uniformly mixed translucent PAN. polymer solution, and then put 0.3g single-walled carbon nanotubes (SWCNTs) into the polymer solution, ultrasonically 0.5h to disperse the SWCNTs in the polymer solution evenly, then stir it at 50°C with a magnetic stirrer, and 0.5 g of polyvinylidene fluoride (PVDF) powder was added several times in small amounts to finally obtain a uniformly mixed co-spun polymer solution. Fix the hydrophobically treated gas diffusion layer material on the receiving drum of the electrospinning device. The process of hydrophobic treatment is to immerse the carbon paper in the polytetrafluoroethylene hydrophobic agent for 10 minutes, and calcined at 350°C for 30 minutes. minutes, wherein the solid content of the hydrophobic agent is 15-25 wt%. Use a 2ml or 5ml syringe to take 2ml to 3ml of...

Embodiment 2

[0052]Weigh 0.6g of polyacrylonitrile (PAN) powder and 10g of N,N-dimethylformamide (DMF), mix them in a beaker, and stir at 60°C for 0.5h with a magnetic stirrer to form a uniformly mixed translucent PAN. polymer solution, then put 0.3g multi-walled carbon nanotubes (MWCNTs) into the polymer solution, ultrasonically 0.5h to disperse the MWCNTs evenly in the polymer solution, then stir it with a magnetic stirrer at 50°C, and 0.4 g of polyvinylidene fluoride (PVDF) powder was added several times in small amounts to finally obtain a uniformly mixed co-spun polymer solution. Fix the hydrophobically treated gas diffusion layer material on the receiving drum of the electrospinning device. The process of hydrophobic treatment is to immerse the carbon paper in the polytetrafluoroethylene hydrophobic agent for 10 minutes, and calcined at 340 ° C for 30 minutes, wherein the solid content of the hydrophobic agent is 15-25 wt%. It was electrospun on the side of the hydrophobic carbon pa...

Embodiment 3

[0060] Weigh 0.8g of polyacrylonitrile (PAN) powder and 10g of N,N-dimethylformamide (DMF), mix them in a beaker, and stir at 60°C for 0.5h with a magnetic stirrer to form a uniformly mixed translucent PAN. polymer solution, then put 0.2g graphene oxide (GO) into the polymer solution, ultrasonically disperse GO in the polymer solution for 0.5h, then stir it at 50°C with a magnetic stirrer, and a small amount of Add 0.3g of polyvinylidene fluoride (PVDF) powder one by one, and finally obtain a uniformly mixed co-spun polymer solution. Fix the hydrophobically treated gas diffusion layer material on the receiving drum of the electrospinning device. The process of hydrophobic treatment is to immerse the carbon paper in the polytetrafluoroethylene hydrophobic agent for 10 minutes, and calcined at 330°C for 30 minutes. minutes, wherein the solid content of the hydrophobic agent is 15-25 wt%. Use a 2ml or 5ml syringe to take 2ml to 3ml of the co-spun polymer solution and fix it on t...

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Abstract

The invention relates to a nano carbon-doped porous fiber single electrode, a membrane electrode and a preparation method. According to the nano carbon-doped porous fiber single electrode, a semi-ordered porous nano fiber thin film is deposited at one side of a gas diffusion layer material; and a layer of metal nanoparticles with catalytic activity is evenly deposited on the nanofiber surface of the semi-ordered porous nano fiber thin film to form the nano carbon-doped porous fiber single electrode, wherein the semi-ordered porous nano fiber thin film is formed by a co-spun high-molecular polymer nano charged superfine fiber attached with a nano carbon material on the surface, and comprises a co-spun high-molecular polymer doped with the nano carbon material as the component. According to the nano carbon-doped porous fiber single electrode, the semi-ordered porous nano fiber layer is formed by the nano carbon material and a high-molecular polymer solution through electrostatic spinning and cospinning for the first time; a catalyst is sprayed on the porous nano fiber layer; and a mico-pore layer and a catalyst layer are combined into one, so that the properties of a prepared single battery are greatly improved; and the lifetime is greatly prolonged.

Description

technical field [0001] The invention relates to a semi-ordered electrostatic spinning nano-carbon doped porous fiber single electrode, a membrane electrode and a preparation method, and belongs to the technical field of proton exchange membrane fuel cells. The invention also has strong reference significance for electrodes of other batteries. technical background [0002] Proton exchange membrane fuel cell (Protonexchangemembranefuelcell, PEMFC) is a kind of chemical energy in the fuel directly converted into electrical energy through electrochemical reaction, in addition to the general characteristics of fuel cells (environmentally friendly, high energy conversion efficiency, high energy density, etc.) In addition, it can start quickly at room temperature, no electrolyte loss, easy water discharge, long life, high specific power and specific energy. Therefore, there is a very broad space for development in small power stations, automobile power and mobile power sources. M...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/86H01M4/88B82Y30/00
CPCB82Y30/00H01M4/86H01M4/88H01M4/9041Y02E60/50
Inventor 木士春魏孟张建蒋敏
Owner WUHAN UNIV OF TECH
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