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Two-layer hot pressing membrane electrode and production method thereof

A manufacturing method and membrane electrode technology, applied in battery electrodes, circuits, fuel cells, etc., can solve the problems of troublesome production process, unfavorable large-scale production, etc., to improve utilization rate, maintain stability, and enhance catalyst layer structure. Effect

Inactive Publication Date: 2008-05-07
SHANGHAI HORIZON FUEL CELL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of the membrane electrode prepared by this process is better, but the production process is more troublesome, which is not conducive to large-scale production

Method used

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  • Two-layer hot pressing membrane electrode and production method thereof
  • Two-layer hot pressing membrane electrode and production method thereof
  • Two-layer hot pressing membrane electrode and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 , 2 As shown, on the non-bonding flat plate material polycarbonate, cover the porous PTFE film 1 (thickness 4 μ m, porosity greater than 85%, pore diameter is 0.5 μ m), clean with ethanol, and brush on the porous PTFE film A layer of perfluorosulfonic acid membrane solution 2, the dosage is 0.1mg / cm 2 ; Commercially available Nafion (5% wt) solution and 40% Pt / c particles were mixed into (Nafion) solid: 40% Pt / c catalyst = 1:3 catalyst dispersion and coated on the membrane. After drying at 120°C, a CCM with a layer of catalyst 3 attached to the membrane was produced, in which the loading amount of the mixture of catalyst and Nafion was 1.4 mg / cm 2 . Then, the CCM is folded in half, and at least one diffusion layer 4 such as carbon paper can be used to sandwich the upper and lower sides of the CCM, and hot-pressed with a hot press to form a membrane electrode. The temperature of hot pressing is 150°C and the pressure is 30kg / CM 2 .

Embodiment 2

[0028] see figure 1 , 2 , non-stick flat plate material Teflon, cleaned with ethanol. Brush a layer of perfluorosulfonic acid film solution 2 on the non-bonded flat material, the dosage is 5mg / cm 2 ; Commercially available Nafion (5% wt) solution and 40% Pt / c particles were mixed into (Nafion) solid: 40% Pt / c catalyst = 1:3 catalyst dispersion and coated on the membrane. After drying at 120°C, a CCM with a layer of catalyst 3 attached to the membrane was produced, in which the loading amount of the mixture of catalyst and Nafion was 1.4 mg / cm 2 . Then, this CCM is folded in half, attached to the upper and lower sides of the CCM with polycarbonate thin plates 1, 4, and heat-pressed with a heat press. The temperature of hot pressing is 180°C and the pressure is 60kg / CM 2 .

Embodiment 3

[0030] Such as image 3 As shown, on the unbonded flat glass, cover the porous PTFE film 1 (thickness 4 μm, porosity greater than 85%, pore diameter 0.5 μm) or directly clean the unbonded flat material with ethanol . Apply a layer of perfluorosulfonic acid membrane solution 2 on the porous PTFE film or non-bonded flat material by brushing, the dosage is 0.1mg / cm 2 . Commercially available Nafion (5% wt) solution and 40% Pt / c particles were mixed into (Nafion) solid: 40% Pt / c catalyst = 1:3 catalyst dispersion and coated on the membrane. After drying at 120°C, a CCM with a layer of catalyst 3 attached to the membrane was made, and the loading amount of the mixture of catalyst and Nafion was 1.4 mg / cm 2 . Then, two such CCMs are compounded on the two sides that are not sprayed with the catalyst, and then at least one layer of diffusion layer 4 is used, such as carbon paper, to clamp the upper and lower sides that are coated with the catalyst, and hot press with a hot press, ...

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Abstract

The present invention relates to a double-layer thermal press film electrode and a production method. The film electrode includes two layers, each layer is provided with a half film electrode, the film electrode includes a layer and at least a catalyst, and the half film electrode is half of a layered symmetric film electrode. The non-adhesive plate material is covered with a porous PTFE film as the frame or directly coated with a film solution for curing and then made into a proton exchange membrane; one surface of the proton exchange membrane is sprayed with the catalyst; after the membrane with catalyst is folded or two membranes are overlapped, at least a diffusion layer is arranged between the two surfaces with catalyst; then a hot-pressing machine is used for hot pressing, thus producing a film electrode. Compared with the prior technology, the method provided by the present invention is simple in process and improves the catalyst utilization, which is ideal for automated equipment and large-scale production.

Description

technical field [0001] The invention relates to a fuel cell, in particular to a membrane electrode of the fuel cell and a manufacturing method thereof. Background technique [0002] Fuel cells use hydrogen as fuel, oxygen as oxides, and the by-product of the chemical reaction is water without other harmful substances. It is a safe, reliable, clean and environment-friendly power generation device. With the improvement of fuel cell technology, it has been applied in submarines, automobiles, laptops and mobile phones. [0003] With the expansion of fuel cell application, people are more and more concerned about the industrial application and operability of its components. Proton exchange membranes and membrane electrodes are key parts of fuel cells. Their manufacturing methods are relatively complicated and costly, which also affects the industrialization of fuel cells. [0004] In fuel cells, solid-state proton exchange membranes are commonly used as perfluorosulfonic acid p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M4/86H01M4/88H01M8/1004
CPCY02E60/50Y02P70/50
Inventor 顾志军吴德勇张琴苏惠珍
Owner SHANGHAI HORIZON FUEL CELL TECH
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