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Application of electric pole gaseous diffusion layer in fuel batter with proton exchange film

A technology of gas diffusion layer and proton exchange membrane, applied in the direction of solid electrolyte fuel cells, fuel cells, electrical components, etc., can solve the problems of difficult current collection, high cost, fragile electrode diffusion layer, etc., and achieve good effect and low cost , the effect of simple preparation method

Inactive Publication Date: 2008-03-12
SUNRISE POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In order to overcome the disadvantages of the above-mentioned fuel cell electrode diffusion layer based on carbon paper or carbon cloth, which are fragile, difficult to collect current, and high in cost, the purpose of the present invention is to use the metal mesh as a proton exchange membrane fuel cell electrode through leveling and hydrophobic treatment. Diffusion layer, improve the strength of the electrode diffusion layer, reduce its cost, and facilitate the miniaturization of the electrode

Method used

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  • Application of electric pole gaseous diffusion layer in fuel batter with proton exchange film
  • Application of electric pole gaseous diffusion layer in fuel batter with proton exchange film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Cut out several sheets of titanium stretched mesh of 2.5cm×2cm, the thickness is about 50 microns, and the porosity is 54%. First wash with 0.1M dilute sodium hydroxide solution several times to remove surface organic matter, then wash with 0.1M dilute sulfuric acid solution several times to remove surface metal ions, and then wash with deionized water. Then cook in 10 wt% oxalic acid aqueous solution at 80°C for half an hour, and finally wash with deionized water for use.

[0044] Weigh 100mg of XC-72R carbon black, a certain amount of hydrophobic organic compound (polytetrafluoroethylene PTFE) emulsion and ethanol solvent in a certain proportion, and mix them into a uniform slurry under ultrasonic vibration, in which ethanol accounts for The proportion of material is 99wt%. The weight ratio of the emulsion of carbon black and PTFE is 1:1. Then, this slurry is made onto the both sides surfaces of Ti net by the method of dip coating, obtains the fuel cell electrode di...

Embodiment 2

[0052] Cut out several sheets of titanium stretched mesh of 2.5cm×2cm, the thickness is about 50 microns, and the porosity is 54%. First wash with 0.5M dilute sodium hydroxide solution several times to remove surface organic matter, then wash with 0.5M dilute sulfuric acid solution several times to remove surface metal ions, and then wash with deionized water. Then boil in 3wt% oxalic acid aqueous solution at 60° C. for 30 minutes, and finally wash with deionized water for use.

[0053] After weighing 100mg of XC-72R carbon black, a certain amount of hydrophobic organic compound (polytetrafluoroethylene PTFE) emulsion and isopropanol solvent in a certain proportion, mix them into a uniform slurry under ultrasonic vibration, in which isopropyl alcohol Alcohol accounts for 95wt% of the slurry. The weight ratio of the emulsion of carbon black and PTFE is 1:2. Then, this slurry is made to the both sides surface of Ti net with the method for scraping coating, obtains the fuel cel...

Embodiment 3

[0060] Cut out a piece of stretched platinum mesh of 2.5cm×2cm, with a thickness of about 100 microns and a porosity of 60%. First wash with 1M dilute sodium hydroxide solution several times to remove surface organic matter, then wash with 1M dilute sulfuric acid solution several times to remove surface metal ions, then wash with deionized water, clean and ready for use.

[0061] After weighing 50mg of pearl black, a certain amount of hydrophobic organic compound (polyvinylidene fluoride) emulsion and n-butanol solvent in a certain proportion, mix them into a uniform slurry under ultrasonic vibration, in which n-butanol accounts for The proportion of carbon black is 90wt%, and the weight ratio of the emulsion of carbon black and polyvinylidene fluoride is 10:1. Then, this slurry is made to the both sides surface of Pt mesh by the method of spraying, obtains the fuel cell electrode diffusion layer precursor, and the usage amount of carbon powder in the diffusion layer is contro...

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Abstract

The invention relates to an application of electrode gas diffusion layer in proton exchanging membrane fuel cell, taking metal net carrying carbon powder and lyophobic organic compound as the electrode gas diffusion layer. The preparation method is to make one surface or both surfaces of the metal net flat by carbon powder and lyophobic organic compound, and processing the metal net with the high temperature of 290 to 380 degrees centigrade under the protection of inert gases, by which the electrode gas diffusion layer is obtained and used in proton exchanging membrane fuel cell to instead of carbon paper or carbon cloth under the disposal of dewatering and flatting currently in current use. The electrode diffusion layer is characterized in burliness and fastness, being able to make into different shapes like tubular electrode, convinient electrode flowcombine and easy mass production.

Description

technical field [0001] The invention relates to the application of an electrode gas diffusion layer, in particular to the preparation of an electrode gas diffusion layer and its application in a proton exchange membrane fuel cell. Background technique [0002] A proton exchange membrane fuel cell (PEMFC) is a power generation device that directly converts the chemical energy in fuel and oxidant into electrical energy through an electrochemical reaction. It uses a solid polymer membrane with good proton conductivity as the electrolyte. One side of the membrane is an anode composed of a catalytic layer and a gas diffusion layer, and the other side is a cathode composed of a catalytic layer and a gas diffusion layer. The anode, solid polymer electrolytic membrane and cathode are pressed together to form the core component of the proton exchange membrane fuel cell (PEMFC) - the membrane electrode three-in-one (MEA). Graphite plates or surface-modified metal plates (bipolar plat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/90H01M4/92H01M4/88H01M8/10H01M8/1051
CPCY02E60/522Y02E60/50Y02P70/50
Inventor 邵志刚张华民刘波衣宝廉
Owner SUNRISE POWER CO LTD
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