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Production method of proton exchange membrane fuel cell membrane electrode

A proton exchange membrane and fuel cell membrane technology, applied in the field of electrochemistry, can solve the problems of difficult to meet the entry and product exclusion, rapid decay of membrane electrode performance, low catalyst utilization rate, etc., to avoid catalyst delamination, improve life, The effect of offsetting thickness loss

Active Publication Date: 2015-10-14
KUSN INNOVATION INST OF NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Purpose of the invention: The present invention provides a method for preparing a membrane electrode of a proton exchange membrane fuel cell to solve the problems in the prior art that it is difficult to satisfy the entry of reactants and the elimination of products in the membrane electrode of a fuel cell by using a single membrane electrode preparation process. Problem: Since the performance of the membrane electrode prepared by the screen printing process is not high, the performance of the membrane electrode prepared by the ultrasonic spraying process decays quickly, the utilization rate of the catalyst is low, and the energy consumption of the preparation process is large, so the present invention combines the two processes to overcome Problems arising from the separate preparation of membrane electrodes for each process

Method used

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  • Production method of proton exchange membrane fuel cell membrane electrode
  • Production method of proton exchange membrane fuel cell membrane electrode
  • Production method of proton exchange membrane fuel cell membrane electrode

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Embodiment 1

[0038] A method for preparing a proton exchange membrane fuel cell membrane electrode, comprising the following steps,

[0039] Step 1. Preparation of Electrocatalyst Slurry I

[0040] Weigh 60% Pt / C catalyst, add catalyst, stabilizer water, slurry diluent ethanol and isopropanol mixed solvent (1:1), thickener ethylene glycol, binder 5% ion exchange resin solution , Co-solvent dimethyl sulfoxide, the mass ratio of the above six components is fixed at 1:2:6.8:0.5:20:0.5, in which the ion exchange resin accounts for 50% of the dry weight of the electrocatalyst slurry I, adjust other components The metering ratio, the solid content is kept at 6.5%. After mixing, it is ultrasonically stirred for 60 minutes, then put into an emulsifier, emulsified at 13000r / min for 30 minutes, the dynamic viscosity value is 55mPa·s, sealed, and stored at 10°C;

[0041] Step 2. Preparation of thin-layer electrodes by screen printing process

[0042] A. Adjust the screen printing equipment, it will...

Embodiment 2

[0053] A method for preparing a proton exchange membrane fuel cell membrane electrode, comprising the following steps,

[0054] Step 1. Preparation of Electrocatalyst Slurry I

[0055] Weigh 60% Pt / C catalyst, add catalyst, stabilizer water, diluent mixed solvent of ethanol and isopropanol (1:1), thickener ethylene glycol, binder 5% ion exchange resin solution, Co-solvent dimethyl sulfoxide, the mass ratio of the above six components is 1:2:5:0.5:30:0.5, in which the ion exchange resin accounts for 60% of the dry weight of the electrocatalyst slurry I, adjust the metering ratio of other components, Keep the solid content at 6.5%. After mixing, ultrasonically stir for 30 minutes, then put it into an emulsifier, emulsify at 13000r / min for 30 minutes, the dynamic viscosity value is 30mPa·s, seal it, and store it at 10°C;

[0056]Step 2. Preparation of thin-film electrode

[0057] A. Adjust the screen printing equipment, it will have 6*6cm 2 The screen frame of the effective sc...

Embodiment 3

[0068] A method for preparing a proton exchange membrane fuel cell membrane electrode, comprising the following steps,

[0069] Step 1. Preparation of Electrocatalyst Slurry I

[0070] Weigh 60% Pt / C catalyst, add catalyst, stabilizer water, diluent mixed solvent of ethanol and isopropanol (1:1), thickener ethylene glycol, binder 5% ion exchange resin solution, Co-solvent dimethyl sulfoxide, the mass ratio of the above six components is 1:2:4:2:10.8:0.5, in which the ion exchange resin accounts for 35% of the dry weight of the electrocatalyst slurry I, adjust the metering ratio of other components, Keep the solid content at 7.5%. After mixing, ultrasonically stir for 30 minutes, then put it into an emulsifier, emulsify at 13000r / min for 30 minutes, the dynamic viscosity value is 55mPa·s, seal it, and store it at 10°C;

[0071] Step 2. Preparation of thin-film electrode

[0072] A. Adjust the screen printing equipment, it will have 6*6cm 2 The screen frame of the effective s...

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Abstract

The invention discloses a production method of a proton exchange membrane fuel cell membrane electrode. A screen printing technology and an ultrasonic spraying technology which are two production technologies of membrane electrodes are adopted, an electrocatalyst slurry I undergoes the screen printing technology, an electrocatalyst slurry II undergoes the ultrasonic spraying technology and then is directly or indirectly supported on a proton exchange membrane, and the produced membrane electrode has a catalyst layer with a gradient network structure. The membrane electrode with high performance, long life, multiple layers and gradient network structure is produced by using different contents of an adhesive in different electrocatalyst slurries; and the compact structure of the catalyst layer in a thin layer electrode and an ultrasonic sprayed loose three-dimensional network structure make the interface resistivity of the catalyst layer lower than the that of the three-dimensional network structure, and the area of the introduced thin layer electrode is greater than the spray area when the effective area of the catalyst layer is ensured, so the contact part of a bipolar plate and the thin layer electrode can well facilitate electron conduction in the cell assembling process.

Description

technical field [0001] The invention belongs to the field of electrochemistry, in particular to a method for preparing a membrane electrode of a proton exchange membrane fuel cell. Background technique [0002] A fuel cell (Fuel Cell) is an energy conversion device, which can directly convert the chemical energy stored in the fuel into electrical energy, and is not limited by the thermodynamic Carnot cycle, and the energy utilization rate is as high as 80%. At the same time, fuel cells also have the advantages of high energy density, environmental friendliness, low noise, strong safety, long battery life, and wide trial range. They are widely used in small and medium-sized power stations, portable communication power supplies, household cogeneration devices, It can be used in detection power supply in no-man's land, civilian car, aerospace, submarine power supply, etc. [0003] MEA (Membrane Electrode Assembly), also known as membrane electrode, is the heart of the fuel cel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCH01M4/8825H01M4/886Y02E60/50
Inventor 王刚姚颖方刘建国杨小贞黄林陈佳吴聪萍邹志刚
Owner KUSN INNOVATION INST OF NANJING UNIV
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