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A preparation method of fuel cell electrode and membrane electrode with fully ordered structure of catalytic layer

A technology of ordered structure and catalytic layer, applied in fuel cells, battery electrodes, structural parts, etc., to achieve the effects of ensuring stability, improving electrochemical reaction efficiency and energy conversion efficiency, and reducing material transport resistance

Active Publication Date: 2020-01-24
广东泰极动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above studies show that single ordered materials still have limitations in improving the performance or stability of PEMFC electrodes and membrane electrodes.

Method used

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  • A preparation method of fuel cell electrode and membrane electrode with fully ordered structure of catalytic layer
  • A preparation method of fuel cell electrode and membrane electrode with fully ordered structure of catalytic layer

Examples

Experimental program
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Effect test

Embodiment 1

[0034] combined with figure 2 The process and process shown are used to prepare catalyst layer fully ordered polyelectrolyte membrane fuel cell electrodes and membrane electrodes, and conduct discharge tests. The main steps are as follows:

[0035] (1) In situ growth of VACNT arrays on the gas diffusion layer

[0036] After washing and drying a piece of AAO double-pass porous template with a size of 2.3cm×2.3cm (pore size is 30nm, thickness is 100μm), it is bonded with a piece of carbon paper of the same size as the gas diffusion layer 1, and placed in a tube furnace , pass through acetylene at 600°C for 60 minutes, and vapor-deposit it in the pores of the AAO template, and finally use 1mol / L NaOH solution to remove the AAO template to obtain carbon nanotubes 2 vertically grown on the gas diffusion layer 1 Arrays (VACNTs).

[0037] (2) In situ growth of Pt-NW

[0038] The gas diffusion layer loaded with the VACNT array prepared above was impregnated in 50ml with a concentr...

Embodiment 2

[0044] The catalyst layer fully ordered polyelectrolyte membrane fuel cell electrode and membrane electrode with N-doped VACNT array as the carrier were prepared according to the following steps, and the discharge test was carried out.

[0045] (1) In situ growth of N-doped VACNT arrays on the gas diffusion layer

[0046] After washing and drying a piece of AAO double-pass porous template with a size of 2.3cm×2.3cm (pore size is 30nm, thickness is 100μm), it is bonded with a piece of carbon paper of the same size as the gas diffusion layer 1, and placed in a tube furnace , pass through acetylene at 600°C for 60 min, make it vapor-deposit in the channels of the AAO template, and finally use 1mol / L NaOH solution to remove the AAO template, and obtain the carbon nanotube 2 array vertically grown on the gas diffusion layer 1 (VACNTs). Then, the gas diffusion electrode 1 grown with VACNT was placed in the tube furnace again, and NH was fed at a temperature of 500 °C 3 gas, the fl...

Embodiment 3

[0049] A fully ordered polyelectrolyte membrane fuel cell electrode and a membrane electrode with catalytic layer using S-doped VACNT array as a carrier were prepared according to the following steps, and the discharge test was carried out.

[0050] (1) In situ growth of S-doped VACNT arrays on the gas diffusion layer

[0051] Using the same method as in Example 1, VACNTs grown in situ on the gas diffusion layer 1 were firstly prepared. Then, the gas diffusion electrode grown with VACNT was placed in the tube furnace again, and H was introduced at 500 °C. 2 S gas, the flow rate is 0.1slpm, and the surface S-doped VACNT array is obtained

[0052] Step (2) in-situ growth of Pt-NW and step (3) membrane electrode assembly method are the same as in Example 1. Under the same conditions as in Example 1, the discharge test was carried out, and at a working voltage of 0.6V, the current density can reach 0.48A / cm 2 , the maximum power density reaches 0.82W / cm 2 .

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Abstract

The invention discloses a method for preparing fuel cell electrodes and membrane electrodes with a fully ordered structure of a catalytic layer, and relates to the field of fuel cells. In the fuel cell electrodes and membrane electrodes prepared by the method of the invention, the catalytic layer components include catalyst active groups Parts, catalyst supports and ion conductors all have an ordered array structure. This fully ordered catalytic layer structure has a high three-phase reaction interface, which can provide efficient electron, ion and material transport channels, thereby effectively reducing the material transport resistance, charge transport resistance and electrochemical polarization resistance inside the electrode. , effectively improving the electrochemical reaction efficiency and energy conversion efficiency in the electrode. Through single cell performance testing and electrochemical characterization, the electrode and membrane electrode prepared by the preparation method of the present invention are significantly improved in terms of monomer performance and catalytic layer activity compared with electrodes and membrane electrodes prepared by the traditional method.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for preparing a fuel cell electrode and a membrane electrode with a catalytic layer fully ordered structure. Background technique [0002] Electrodes and membrane electrodes are the core components of proton exchange membrane fuel cells (PEMFC). They are the final places for multiphase material transport and electrochemical reactions that cause energy conversion, and determine the performance, life and cost of PEMFC. As early as 2013, the U.S. Department of Energy clearly stated in the "Fuel Cell Technical Roadmap" that the performance target of membrane electrodes in 2020 is to reach a power density of 1.0W / cm 2 , the accelerated aging life can reach 5000h, and the cost is less than 14$ / kW. With the process of commercialization of PEMFC, people put forward a higher pursuit of its performance and life. [0003] However, in the current preparation of PEMFC electrodes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1004H01M4/92
CPCH01M4/926H01M8/1004H01M2008/1095Y02E60/50
Inventor 姚东梅苏华能张玮琦马强徐丽徐谦李华明
Owner 广东泰极动力科技有限公司
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