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Construction method for noble metal hollow tube array-based ordered membrane electrode assemblies

A technology of noble metals and hollow tubes, applied in battery electrodes, nanotechnology for materials and surface science, circuits, etc., can solve problems such as easily damaged ordered structures and complicated preparation processes, and achieve improved catalytic activity and utilization. The effect of simple steps and wide application prospects

Active Publication Date: 2016-05-25
上海氢锐科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problem with this method is that the preparation process is relatively complicated, and the growth conditions of the whiskers need to be strictly controlled, and the orderly structure of the catalytic layer is easily destroyed when the rolling is transferred.

Method used

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  • Construction method for noble metal hollow tube array-based ordered membrane electrode assemblies
  • Construction method for noble metal hollow tube array-based ordered membrane electrode assemblies
  • Construction method for noble metal hollow tube array-based ordered membrane electrode assemblies

Examples

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Embodiment 1

[0048] Such as Figure 8 As shown, this embodiment provides a method for constructing an ordered membrane electrode based on a noble metal hollow tube array, including steps:

[0049] Such as Figure 8 As shown, step 1) S11 is first performed to provide a substrate, and a zinc oxide seed layer is prepared on the substrate.

[0050] As an example, the substrate includes one of a silicon wafer, carbon paper, and carbon paper fabricated with a gas diffusion layer. In this embodiment, the substrate is carbon paper made with a gas diffusion layer, and the mass fraction of polytetrafluoroethylene in the gas diffusion layer of the carbon paper made with a gas diffusion layer is 10% to 30%, and The loading capacity of the gas diffusion layer is 1~2mg / cm 2 . Specifically, the carbon powder, the polytetrafluoroethylene dispersion liquid and the isopropanol aqueous solution are mixed, ultrasonically uniform, sprayed onto the carbon paper, and finally heat-treated to obtain the carbon...

Embodiment 2

[0075] This embodiment provides a method for constructing an ordered membrane electrode based on a noble metal hollow tube array, the basic steps of which are as in Embodiment 1, wherein, in this embodiment, Cu is used as a metal replacement agent to prepare a Pt nano-array structure and used as The cathode catalyst layer prepares an ordered membrane electrode, comprising the following steps:

[0076] 1) Preparation of ZnO nano-arrays: ZnO nano-arrays were prepared on carbon paper prepared with GDL according to Example 1.

[0077] 2) Prepare a metal displacer on the ZnO nanoarray: use a magnetron sputtering apparatus to make a layer of Cu on the ZnO nanoarray as a metal displacer; the sputtering process is as follows: copper (purity is 99.99%) as the target material, DC power supply The power is 50W, and the sputtering time is 50s.

[0078] 3) Preparation of Pt nanoarrays on ZnO nanoarrays: Weigh 18.68 mg of K 2 PtCl 4 Dissolve in 300ml water, stir well to get K with a conc...

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Abstract

The invention provides a construction method for noble metal hollow tube array-based ordered membrane electrode assemblies. A noble metal nano-array is obtained by using a zinc oxide nano-array to form an ordered structure. The method comprises fabrication of a zinc oxide seed crystal layer, growth of the zinc oxide nano-array, preparation of a thin-layer metal displacer, preparation of a noble metal catalyst, fabrication of the membrane electrode assemblies and removal of zinc oxide. Through a noble metal displacement method, a simple and controllable method for fabricating the low-noble metal load ordered membrane electrode assemblies is achieved; compared with a conventional method, the method provided by the invention is improved in that the catalytic activity and the utilization rate of noble metal are significantly improved under the premise of ensuring relatively good battery performance; the amount of the noble metal is effectively reduced; a new thought is provided for design of the low-noble metal load ordered membrane electrode assemblies; and the method is simple in step and has a wide application prospect in the field of a fuel cell.

Description

technical field [0001] The invention relates to the fields of proton exchange membrane fuel cells and direct alcohol fuel cells, in particular to a method for constructing ordered membrane electrodes of fuel cells based on noble metal hollow tube arrays. Background technique [0002] With the vigorous development of the market of clean transportation power and portable electronic products, people expect more and more that the performance of batteries can better meet the power requirements of related products. Due to the advantages of high energy density, low pollution and low operating temperature, proton exchange membrane fuel cells and direct alcohol fuel cells have become the research hotspots of the new generation power system. However, the cost, output power density, and service life of the above two types of batteries have not yet met the commercial requirements. How to reduce the platinum loading of the battery to reduce its cost, and how to improve the electrode str...

Claims

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Application Information

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IPC IPC(8): H01M4/88B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/8825H01M4/8896Y02E60/50
Inventor 杨辉王国樑雷林峰邹志青邹亮亮
Owner 上海氢锐科技有限公司
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