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Preparation method and forming fixture of membrane electrode of proton exchange membrane fuel cell

A proton exchange membrane and fuel cell membrane technology, applied in battery electrodes, manufacturing tools, circuits, etc., can solve problems such as cumbersome operations, expensive molding equipment, and increased production costs of proton exchange membrane fuel cells

Inactive Publication Date: 2012-06-13
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Although the above methods can improve the electrochemical performance of the proton exchange membrane fuel cell, most of them are cumbersome to operate, or introduce relatively expensive molding equipment
This increases the production cost of proton exchange membrane fuel cells

Method used

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  • Preparation method and forming fixture of membrane electrode of proton exchange membrane fuel cell
  • Preparation method and forming fixture of membrane electrode of proton exchange membrane fuel cell
  • Preparation method and forming fixture of membrane electrode of proton exchange membrane fuel cell

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preparation example Construction

[0043] The embodiment of the invention discloses a method for preparing a membrane electrode of a gardenia exchange membrane fuel cell, comprising:

[0044] The catalyst anode layer, the proton exchange membrane layer and the catalyst cathode layer are sequentially stacked between two parallel flat plates; screw holes are provided on the flat plates, and the two flat plates are connected by bolts; the setting torque is 0.5N·m~ 5N·m, the relative positions are fixed after the two plates are pressed; the catalyst anode layer includes an anode diffusion layer and an anode catalyst layer covering the surface of the anode diffusion layer; the catalyst cathode layer includes a cathode diffusion layer and a coating layer a cathode catalyst layer on the surface of the anode diffusion layer;

[0045] Take out the fixed two plates, and the catalyst anode layer, proton exchange membrane layer and catalyst cathode layer between the two plates at 140°C to 300°C for 2min to 30min, remove th...

Embodiment 1

[0069] In a piece of 2×2cm 2 On the anode carbon paper, spray 3mg / cm 2 Platinum ruthenium black catalyst, on another sheet 2 x 2cm 2 On the cathode carbon paper, spray 3mg / cm 2 Platinum black catalyst, put these two carbon papers on a 3×3cm 2 On both sides of the Nafion117 membrane, the catalyst layer is in contact with the Nafion membrane, and then these membrane electrode assemblies are placed in figure 2 Between the two flat plates of the forming jig shown, the flat plates are made of steel plates, and the two flat plates are fixed by screws with a torque of 0.9 N·m.

[0070] The jig was heated in an oven at 200°C for 10 minutes, taken out, and cooled to obtain a membrane electrode.

[0071] Install this membrane electrode in a self-breathing methanol fuel cell, test its performance at room temperature, the concentration of methanol is 3M, the test results are as follows image 3 shown. image 3 The voltage and power curves tested when the membrane electrode prepared...

Embodiment 2

[0073] In a piece of 2×2cm 2 On the anode carbon paper, spray 2mg / cm 2 Platinum ruthenium black catalyst, on another sheet 2 x 2cm 2 On the cathode carbon paper, spray 2mg / cm 2 Platinum black catalyst, put these two carbon papers on a 3×3cm 2 On both sides of the Nafion117 membrane, the catalyst layer is in contact with the Nafion membrane, and then these membrane electrode assemblies are placed in figure 2Between the two flat plates of the forming jig shown, the flat plates are made of steel plates, and the two flat plates are fixed by screws with a torque of 0.9 N·m.

[0074] The jig was heated in an oven at 220° C. for 8 minutes, taken out, and cooled to obtain a membrane electrode.

[0075] Install this membrane electrode in a self-breathing methanol fuel cell, test its performance at room temperature, the concentration of methanol is 3M, the test results are as follows Figure 4 shown. Figure 4 The voltage and power curves tested when the membrane electrode prepar...

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Abstract

The invention provides a preparation method and forming fixture of a membrane electrode of a proton exchange membrane fuel cell. The preparation method comprises the following steps of: sequentially stacking a catalyst cathode layer, a proton exchange membrane layer and a catalyst cathode layer between two flat plates which are placed in parallel, wherein the flat plates are provided with screw holes and are connected through a bolt; setting the torque as 0.5-5 N m, and compacting the two flat plates and fixing the relative positions; heating the fixed two flat plates as well as the catalyst cathode layer, proton exchange membrane layer and catalyst cathode layer between the two flat plates at 140-300 DEG C for 2-30 min before taking out; and removing the flat plates to obtain the membrane electrode of the proton exchange membrane fuel cell. Experiment proves that: the membrane electrode prepared by the method has relatively excellent discharge performance, and the preparation technology is easy to operate and does not need a relatively expensive high-precision mould press. Therefore, the preparation of the membrane electrode using the method is easy to operate, the cost is low, and the electrochemical performance of the membrane electrode is excellent.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a method for preparing a membrane electrode of a proton exchange membrane fuel cell and a jig for forming the membrane electrode of a proton exchange membrane fuel cell. Background technique [0002] A fuel cell is a power generation device that directly converts chemical energy into electrical energy through an electrochemical reaction. It was first proposed by Gove in 1839. Compared with traditional energy conversion systems, fuel cells have many advantages: first, they are not limited by the Carnot cycle, and the energy conversion efficiency is high; second, the product is usually water, which has little environmental pollution. The high-efficiency and non-polluting properties of fuel cells have attracted more and more attention in recent years. [0003] Proton exchange membrane fuel cell (PEMFC) is an important type of fuel cell, which is a device that generates electricity through...

Claims

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Application Information

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IPC IPC(8): H01M4/88B25B11/00
CPCY02E60/50
Inventor 廖建辉严亮司风占刘长鹏梁亮邢巍
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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