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Fuel cell electrode and preparation method and application thereof

A fuel cell electrode and fuel cell technology, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of non-uniform dispersion of co-catalysts and non-uniform electrode catalysts, so as to optimize the three-phase reaction interface, improve catalytic performance and Output power, improve contact effect

Active Publication Date: 2021-11-19
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to overcome the above-mentioned deficiencies of the prior art, provide a kind of fuel cell electrode and its preparation method and application thereof, to overcome existing fuel cell electrode catalyst Can not be uniform or the co-catalyst can not be uniformly dispersed, and the electrode is dense and other technical problems

Method used

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  • Fuel cell electrode and preparation method and application thereof
  • Fuel cell electrode and preparation method and application thereof
  • Fuel cell electrode and preparation method and application thereof

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preparation example Construction

[0029] Based on the fuel cell electrode described above, an embodiment of the present invention also provides a preparation method of the fuel cell electrode. The preparation method technological process of described fuel cell electrode is as follows figure 1 As shown, it includes the following steps:

[0030] Step S01: providing a nanofiber catalyst for fuel cells;

[0031] Step S02: Mixing the nanofiber catalyst, the polymer electrolyte membrane material and the first binder and preparing the first spinning slurry;

[0032] Step S03: Using electrospinning technology, performing a first spinning treatment on the first spinning slurry to obtain catalyst-containing composite nanofibers.

[0033] Wherein, in the step S01, as an example, the method for providing the nanofiber catalyst for a fuel cell includes the following steps:

[0034] Step S011: mixing the soluble platinum source, the soluble tungsten source and the second binder and preparing a second spinning slurry;

...

Embodiment 11

[0048] This embodiment provides a fuel cell electrode and a preparation method thereof. The fuel cell electrode is prepared by a method comprising the following steps:

[0049] S11. Preparation of Pt / WO 3 / C nanofiber catalyst:

[0050] a is mixed with the second spinning size:

[0051] Weigh 1g of chloroplatinic acid, 1g of ammonium tungstate and 2.5g of 8wt.% polyvinylpyrrolidone solution, mix evenly, and after ultrasonication for 4h, stir for 24h to prepare the second spinning slurry;

[0052] b Preparation of chloroplatinic acid / ammonium tungstate / polyvinylpyrrolidone nanofibers by electrospinning technology:

[0053] Use the second spinning slurry as raw material, wrap aluminum foil on the surface of the drum receiver, and receive the nanofibers obtained by spinning; the condition parameters are: the liquid flow rate is 0.6mL h -1 , the distance between the needle tip and the drum receiver is 16cm, the voltage is 12kV, and the receiving time is 2.5h to obtain chloropl...

Embodiment 12

[0067] This embodiment provides a fuel cell electrode and a preparation method thereof. The preparation method of the fuel cell electrode is different from that of Example 11 in that: the prepared Pt loading is 0.05-0.09 mg cm -2 , Pt and WO 3 Catalyst-containing composite nanofibers with a mass ratio of 1:2.

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Abstract

The invention provides a fuel cell electrode and a preparation method and application thereof. The fuel cell electrode is formed by composite nanofibers containing a catalyst, and the material of the composite nanofibers comprises a mixture of a nanofiber catalyst, a polymer electrolyte membrane material and a binder. The fuel cell electrode catalyst can be uniformly dispersed, a three-phase reaction interface is optimized, and the utilization rate and the output power of the catalyst are improved. According to the preparation method of the fuel cell electrode, the preparation process is effectively simplified, the process controllability is high, the production efficiency is improved, and the electrochemical stability of the prepared fuel cell electrode is ensured. The fuel cell comprising the fuel cell electrode is high in catalytic efficiency, relatively lower in economic cost and high in power density.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a fuel cell electrode and a preparation method and application thereof. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) has the advantages of high power density, high energy conversion efficiency, low temperature start-up, and environmental friendliness, and is considered as an ideal power source for stationary power stations, electric vehicles, and portable power sources. However, if it wants to be successfully commercialized, it mainly faces two problems of cost and lifespan. In fuel cell components, the cost of membrane electrodes accounts for nearly half, and improving the utilization of catalysts in membrane electrodes is the most direct way to reduce the cost of fuel cells. [0003] The traditional method of preparing electrodes is mainly to spray or coat the catalyst slurry on the proton exchange membrane or gas diffusion layer. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/92
CPCH01M4/8663H01M4/8668H01M4/8652H01M4/923H01M4/926H01M4/88Y02E60/50
Inventor 洪绍景许永亮周飞鲲李目武
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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