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Ordered 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 the problems of difficult preparation of electrodes, low performance, and high loading of precious metals, and improve battery performance and catalyst utilization. The effect of improving and improving the conductivity

Inactive Publication Date: 2007-06-20
中科军联(张家港)新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, electrodes with ideal electrode structures are difficult to prepare, and there are no reports in the literature. At the same time, electrodes prepared by other methods still have problems such as high loading of noble metals and low performance.

Method used

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  • Ordered membrane electrode of proton-exchange membrane fuel battery
  • Ordered membrane electrode of proton-exchange membrane fuel battery
  • Ordered membrane electrode of proton-exchange membrane fuel battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036](1) Take a piece of Na-type Nafion  115 membrane (Dupont) was kept under 0.06MPa negative pressure for 30 minutes. At 60°C, 320mg Nafion (5% aqueous solution, EW value 1100) will be sprayed on the surface of Nafion membrane, and the final loading of Nafion sprayed is 1mg / cm 2 . Fig. 1a. is the scanning electron microscope image of the unmodified Nafion film surface in embodiment 1; Fig. 1 b. shows the Nafion film surface scanning electron microscope image modified by Nafion solution;

[0037] (2) Add 96mg of PtRu black (Johnson Matthey), 1900mg of a mixed solution of isopropanol and water (water: isopropanol=1:20, mass ratio), mix well, then add 400mg of 5% Nafion, and then add Nafion solution 0.5M NaOH solution of the same quality, mixed evenly to obtain a catalyst slurry, sprayed on the membrane, and the final catalyst loading was 3.2mg / cm 2 .

[0038] Spray 1mg / cm on the other side of Nafion115 2 Nafion solution (Nafion dry weight). Accurately weigh 50 mg of Pt...

Embodiment 2

[0048] In order to facilitate comparison of the effects of the present invention, take a piece of Na-type Nafion115 film, the surface of which is not sprayed with Nafion solution, prepare catalyst slurry according to the method in Example 1, and directly spray on the film. The composition of the catalytic layer and the carrying capacity of the catalyst Example 1. without heat treatment.

[0049] The membrane electrode prepared by this method is denoted as MEA2.

[0050] The cathode catalyst utilization rate of MEA2 is shown in Table 1, and the performance at 75°C is shown in Figure 2.

Embodiment 3

[0052] Prepare the electrode according to the steps in Example 1, except that in step (3), the prepared membrane electrode is treated at 160 ° C for 3 hours under nitrogen protection

[0053] The membrane electrode prepared by this method is denoted as MEA3.

[0054] The cathode catalyst utilization of MEA3 is shown in Table 1, and the performance at 75°C is shown in Figure 4.

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Abstract

The invention is concerned with a method to increase extraction efficiency of semiconductor LBD by texturing film transfer. Develop conventional semiconductor LBD, weld the core of flip semiconductor LBD, product template with micro / nanometer-figures by the designed light-etched domain, select and confect a kind of prepolymer in appropriate proportion and print the ultrastructure figure on the prepolymer colloid with micro / nanometer print technology and solidify the prepolymer colloid film, peel off the prepolymer film with ultrastructure figure and get the texturing film medium film. The step of texturing film transferring is spreading transparent PMMA glue on underlay of LBD, setting the side of texturing film with figure upside and pasting on the core of diode, setting the side of texturing film with figure peeled off upside and pasting on the core of diode, adding proper temperature to solidify the transparent agglutinating glue.

Description

technical field [0001] The invention relates to a proton exchange membrane fuel cell, in particular to a novel ordered proton exchange membrane fuel cell membrane electrode structure and its preparation method and application. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy of fuel and oxidant into electrical energy. Its fuel can be hydrogen, reformed gas of organic compounds such as petroleum and methanol, and organic alcohols such as liquid methanol and ethanol. Fuel cells have the advantages of simple structure, high theoretical specific energy density, and environmental friendliness. They are especially suitable for portable power sources, electric locomotive power sources and decentralized power stations, etc., and have broad application prospects. [0003] Membrane electrodes are the core components of proton exchange membranes, and their performance and cost must meet the requirements for commercializat...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88H01M8/02H01M8/10C25B9/00C08J5/22H01M8/0271H01M8/1004
CPCY02E60/522Y02E60/50
Inventor 孙公权王素力孙海汪国雄毛庆王琪辛勤
Owner 中科军联(张家港)新能源科技有限公司
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