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Production of electrode for fuel cell or electrolyzed membrane

A fuel cell and membrane electrode technology, which is applied to fuel cell parts, fuel cells, battery electrodes, etc., can solve the problem of increasing the manufacturing cost of membrane electrodes, increasing the transfer resistance of reactants and products, and reducing the utilization rate of inner layer electrocatalysts. And other issues

Inactive Publication Date: 2007-11-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of a large amount of ion-conducting polymer electrolytes (such as Nafion (Du pont), which is currently widely used in PEMFC and SPE to electrolyze water for hydrogen production) increases the manufacturing cost of membrane electrodes on the one hand, and on the other hand will inevitably affect the catalytic layer. Electron conductivity, and increase the transfer resistance of reactants and products in the catalytic layer, reducing the utilization of the inner electrocatalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 40mg of cathode catalyst Pt / C (20wt%Pt, Johnson Matthey Corp.), add 2ml glycerol as solvent, then add 100mg5wt% perfluorosulfonic acid resin Nafion (Du pont) emulsion as polymer electrolyte, ultrasonically disperse Evenly, the cathode catalyst ink is prepared. Take by weighing anode catalyst Pt-Ru / C (20wt%Pt, 10wt%Ru, Johnson Matthey Corp.) 40mg, add 2ml glycerol as solvent, then add the perfluorosulfonic acid resin Nafion (Du pont) emulsion of 100mg5wt% as The polymer electrolyte is uniformly dispersed by ultrasonic to prepare the anode catalyst ink. On one side of the Nafion112 membrane, on an area of ​​1×4cm, press 2.0mg·cm -2 For the standard of cathode catalyst, spray the cathode catalyst ink evenly on the membrane, on the other side of the Nafion112 membrane, on the area of ​​1×4cm, press 2.0mg·cm -2 For the standard of anode catalyst, spray the anode catalyst ink evenly on the membrane, place the Nafion112 membrane sprayed with cathode catalyst ink and an...

Embodiment 2

[0023] Weigh 50mg of cathode catalyst Pt / C (20wt% Pt, Johnson Matthey Corp.), add 2ml of ethylene glycol as solvent, then add 100mg of 5wt% perfluorosulfonic acid resin Nafion (Du pont) emulsion as polymer electrolyte, ultrasonically disperse Evenly, the cathode catalyst ink is prepared. Take by weighing anode catalyst Pt-Ru / C (20wt%Pt, 10wt%Ru, Johnson Matthey Corp.) 50mg, add 2ml ethylene glycol as solvent, then add the perfluorosulfonic acid resin Nafion (Du pont) emulsion of 100mg5wt% as The polymer electrolyte is uniformly dispersed by ultrasonic to prepare the anode catalyst ink. On one side of the Nafion115 membrane, on an area of ​​1×4cm, press 2.5mg·cm -2 For the cathode catalyst standard, apply the cathode catalyst ink completely and evenly on the membrane, on the other side of the Nafion115 membrane, on the area of ​​1×4cm, press 2.5mg·cm -2The standard of anode catalyst, the anode catalyst ink is evenly coated on the membrane, and the Nafion115 membrane coated wi...

Embodiment 3

[0026] Weigh 40mg of cathode catalyst Pt / C (20wt%Pt, Johnson Matthey Corp.), add 2ml glycerol as solvent, then add 100mg5wt% perfluorosulfonic acid resin Nafion (Du pont) emulsion as polymer electrolyte, ultrasonically disperse Evenly, the cathode catalyst ink is prepared. Take by weighing anode catalyst Pt-Ru / C (20wt%Pt, 10wt%Ru, Johnson Matthey Corp.) 40mg, add 2ml glycerol as solvent, then add the perfluorosulfonic acid resin Nafion (Du pont) emulsion of 100mg5wt% as The polymer electrolyte is uniformly dispersed by ultrasonic to prepare the anode catalyst ink. On the 1×4cm carbon paper cathode diffusion layer, press 2.0mg·cm -2 The cathode catalyst standard, the cathode catalyst ink is sprayed completely and evenly on the carbon paper cathode diffusion layer. On a 1×4cm carbon paper anode diffusion layer, press 2.0mg·cm -2 Standard for anode catalysts, spray the anode catalyst ink completely and evenly on the carbon paper anode diffusion layer. Then, the cathode diffus...

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Abstract

This is a membrance electrode process method for fuel cell or eletrolysis. The membrance electrode includes a structure of three-layer or five-layer. The three-layer structure is composed by cathode catalytic layer-polymer electrolyte membrance-anode catalytic layer. The process method is as: loading cathode and anode catalytic ink to the two sides of the polymer electrolyte membrance and dry in AC field. The five-layer structure is composed by cathode diffusing layer-cathode catalytic layer-polymer electrolyte membrance-anode catalytic layer-anode diffusing layer. The process method is as: loading cathode and anode catalytic ink to cathode and anode diffusing layer separately and dry in AC field; heat compressing the cathode and anode to the polymer electrolyte membrance.

Description

technical field [0001] The invention relates to a preparation method of a membrane electrode used for fuel cells or electrolysis, which belongs to the membrane electrode manufacturing technology. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a power generation device that directly converts chemical energy in fuel and oxidant into electrical energy. It has the advantages of high energy conversion efficiency, high reliability, large specific energy, environmental friendliness, and easy start-up. [0003] Solid Polymer Electrolyte (Solid Polymer Electrolyte, SPE) electrolysis of water to produce hydrogen is an electrolysis technology that uses solid polymer membranes as ion exchange membranes to replace alkaline aqueous solutions in traditional alkaline electrolyzers. It has high electrolysis efficiency, The product gas has the advantages of high purity, safe and reliable use. [0004] The membrane electrode (Membrane Electrode Assembly, MEA) is t...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M8/02C25B11/00C25C7/02H01M8/1004
CPCY02E60/50Y02P70/50
Inventor 王宇新王志涛许莉
Owner TIANJIN UNIV
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