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Electrode of fuel battery with proton exchange membrane and its production

A fuel cell electrode and proton exchange membrane technology, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems affecting the transfer or diffusion of reactants and the performance degradation of fuel cells, so as to achieve uniform distribution, improve electrode performance, increase three The effect of phase interface

Active Publication Date: 2007-09-26
SUNRISE POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned electrodes are all sintered at a low temperature of 80-150°C. The carbon-supported catalytic active component (catalyst) of this type of hydrophilic electrode is in good contact with Nafion, but there is no hydrophobe or hydrophobic group. Therefore, this type of electrode It is easy to "flood", which affects the transfer or diffusion of reactants and greatly reduces the performance of fuel cells

Method used

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  • Electrode of fuel battery with proton exchange membrane and its production
  • Electrode of fuel battery with proton exchange membrane and its production
  • Electrode of fuel battery with proton exchange membrane and its production

Examples

Experimental program
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Effect test

Embodiment 1

[0046] After weighing an appropriate amount of catalyst, Nafion and solvent in a certain proportion, they are mixed by ball milling to form a uniformly mixed slurry, wherein the amount of Nafion resin is 7wt.%. Then, make this slurry on the surface of the gas diffusion layer through the leveling process by scraping to obtain the fuel cell electrode precursor containing the catalyst layer, and the usage amount of platinum (Pt) in the cathode catalyst layer is controlled at 0.2-0.6mg / cm 2 , the amount of platinum (Pt) used in the anode catalytic layer is controlled at 0.1-0.3 mg / cm 2 . After drying at 330°C, nitrogen (N 2 ) under the protection of roasting for 80 minutes, then naturally cool to room temperature, and then spray Nafion on the surface of the electrode catalyst layer with a content of 0.1-0.2 mg / cm 2 solid electrolyte. Using Nafion1135 membrane, the anode and cathode are placed on both sides of the Nafion1135 membrane, and hot-pressed at 180 ° C to obtain a thr...

Embodiment 2

[0050] According to the method of Example 1, after preparing the precursor containing the catalytic layer, the calcination temperatures were 280°C, 320°C, and 340°C respectively, and the membrane-electrode three-in-one and the single cell were prepared according to the method of Example 1.

Embodiment 3

[0052] According to the method of embodiment 1, the amount of Nafion resin in the catalytic layer is adjusted to 15wt.% and 30wt.% by the 7wt.% of embodiment 1 to prepare electrodes, and the method of embodiment 1 is used to prepare membrane-electrode three-in-one and single cell . Add the anode and cathode flow field plates on both sides of the three-in-one membrane electrode, the current collector plate and the end plate to form a single cell.

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Abstract

The precursor of electrode with catalysis layer is calcined under protection of inert gas at 250-450 DEG C to make the solid polyelectrode in catalysis layer lose sulfonic acid radical. The other organic groups have hydrophobic behavior, and the undecomposed solid polyelectrolyte has hydrophilicity so that the electrode catalysis layer of proton exchange film fuel cell with evenly distributed hydrophile structure and hydrophobic structure is formed. With conventional method, makes the electrode.

Description

technical field [0001] The invention relates to a solid polymer proton exchange membrane fuel cell electrode and a manufacturing method thereof, in particular to a catalytic layer between a gas diffusion layer and a proton exchange membrane in a solid polymer proton exchange membrane fuel cell and a preparation method thereof. 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 layer is between the gas diffusion layer and the proton exchange membrane, and the electrode catalyst layer provides the electrochemical reaction. The anode, soli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/86H01M4/90H01M4/92
CPCY02E60/50
Inventor 张华民张建鲁王晓丽衣宝廉
Owner SUNRISE POWER CO LTD
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