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Production method of membrane electrode of proton-exchange membrane fuel battery

A proton exchange membrane and fuel cell technology, applied in solid electrolyte fuel cells, fuel cells, battery electrodes, etc., can solve problems such as lack of performance, and achieve the effects of long preparation cycle, enhanced electrolyte strength, and simple process

Active Publication Date: 2009-05-06
SUNRISE POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Production method of membrane electrode of proton-exchange membrane fuel battery
  • Production method of membrane electrode of proton-exchange membrane fuel battery
  • Production method of membrane electrode of proton-exchange membrane fuel battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Cut a 5 μm polytetrafluoroethylene porous membrane (the porosity of the membrane is 90%, and the thickness is 5 μm) into a suitable size, put it in an ethanol solvent, place it in an ultrasonic wave for half an hour, and repeat it again. Cleaning and processing spare;

[0028] 2) Mix the solution containing 5% perfluorosulfonic acid resin (such as Nafion) and the Pt / C catalyst of 70% WT according to the ratio of Nafion:catalyst=1:3. The amount of anode catalyst is 0.5mg / cm 2 Calculation, the amount of cathode catalyst is 0.3mg / cm 2 Calculate, and add a certain amount of isopropanol. In order to allow the catalyst material to disperse evenly in the solution, the proportion of isopropanol should be larger, and add according to the ratio of catalyst:isopropanol=1:100:

[0029] 3) Mix the solution with ultrasonic waves, so that the catalyst material is evenly dispersed in the solution, and set aside;

[0030] 4) Spray a thin layer of adhesive on both sides of the poro...

Embodiment 2

[0038] 1) repeat step 1) in embodiment one;

[0039] 2) Mix the solution containing 5% perfluorosulfonic acid resin (such as Nafion) and the Pt / C catalyst of 70% WT according to the ratio of Nafion:catalyst=1:3, and the amount of cathode catalyst is 0.75mg / cm 2 Calculation, the amount of anode catalyst is 0.75mg / cm 2 Calculate, after adding the isopropanol of the same ratio as in Example one.

[0040] 3) Repeat steps (3) to (9) in Example 1.

[0041] The performance of present embodiment MEA sees figure 2 . Depend on figure 2 It can be seen that the performance of the electrode under normal pressure conditions reaches 0.66V@500mA / cm 2 , slightly better than the performance of Example 1.

Embodiment 3

[0043] 1) repeat step 1) in embodiment one;

[0044] 2) According to step 2) of Example 1, the catalyst material was prepared, and at the same time, 10% of the total weight of the catalyst material was added to the self-humidifying agent silica, and the dispersion was uniform;

[0045] 3) Repeat steps (3) to (9) in Example 1.

[0046] The performance of present embodiment MEA sees image 3 . Depend on image 3 It can be seen that after adding self-humidifying agent, the performance of passing dry air is slightly better than that of humidified air. Therefore, the effect of self-humidification is played.

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Abstract

The invention is concerned with the film electrode preparation method for the proton exchanging film fuel battery, it is: the organic multi-hole film is the electrode supporter, the thickness of the multi-hole film is 1-20 mu meter, the hole rate is 50%-99%, adheres the activator to the multi-hole film directly, prepares the electrode catalyzing layer; combines the catalyzing layer and the electrolyzing film to be the film electrode groupware by heat pressure. The activator of the invention is high using rate, better active, higher intensity.

Description

technical field [0001] The invention relates to a three-in-one membrane electrode for a proton exchange membrane fuel cell, specifically a method for preparing a membrane electrode for a proton exchange membrane fuel cell, which uses a porous film as a support to prepare a mixture of an electrocatalyst and a proton conductor. The electrode active layer is formed on the membrane, and then it is combined with the electrolyte membrane to form a method of MEA. Background technique [0002] A fuel cell is a power generation device that directly converts chemical energy in fuel and oxidant into electrical energy through an electrocatalytic reaction on electrodes. It is not limited by the Carnot cycle and can efficiently convert chemical energy into electricity. So far, five types of fuel cells have been developed: alkaline, phosphoric acid, molten carbonate, high-temperature solid electrolyte and proton exchange membrane. Among them, the proton exchange membrane fuel cell (Proto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M8/10C08J5/22C08J9/00H01M8/1004H01M8/1009
CPCY02E60/521Y02E60/50Y02P70/50
Inventor 侯中军张可林治银王金中赵恩介
Owner SUNRISE POWER CO LTD
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