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Novel membrane electrode component available for fuel cell, preparation method and application thereof

A membrane electrode assembly, fuel cell membrane technology, applied in fuel cell parts, fuel cells, battery electrodes, etc., can solve problems such as reducing the utilization rate of Pt, and achieve the effect of improving the utilization rate, uniform structure, and improving the reaction interface

Inactive Publication Date: 2009-08-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Third, during the ink-forming process, Nafion will cover part of the Pt particles in the catalytic center, blocking its contact with the reaction gas and making it useless Pt, thereby reducing the utilization rate of Pt

Method used

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  • Novel membrane electrode component available for fuel cell, preparation method and application thereof
  • Novel membrane electrode component available for fuel cell, preparation method and application thereof
  • Novel membrane electrode component available for fuel cell, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: as figure 1 As shown, the first is the pretreatment and surface modification of the carbon substrate. The purpose of pretreatment is to modify the surface of the carbon substrate and adjust the hydrophilicity, so as to facilitate the growth of nano-carbon materials or the deposition of catalyst precursors. It can be treated by acid treatment, alkali treatment, or air treatment. Take 5×5cm 2 Carbon paper (Toray-090, Toray Corporation of Japan), immersed in 3mol / l HNO 3 Soak in the solution for 48 hours at 40°C. Wash with deionized water until the pH of the washing solution is 7. It is then filtered and dried to obtain figure 2 The pretreated and surface-modified carbon substrates are shown.

[0038] like figure 1 As shown, the catalysts required for the growth of carbon nanomaterials were supported on the pretreated and surface-modified carbon substrates. The main purpose of depositing catalysts is to better control the structure and properties of ...

Embodiment 2

[0045] Take a piece with an area of ​​5×5cm 2 Carbon cloth, at 60°C, 2mol / l H 2 SO 4 Soak in the solution for 48h. Wash with deionized water until the pH of the washing solution is 7. Then filter and dry to obtain the desired carbon matrix.

[0046] The specific preparation process of the membrane module is the same as that of Example 1 except for the differences in the carbon substrate and the treatment method.

Embodiment 3

[0048] Take a piece with an area of ​​5×5cm 2 Carbon paper, at 60°C, 2mol / l H 2 SO 4 Soak in the solution for 48h. Wash with deionized water until the pH of the washing solution is 7. Then filter and dry to obtain the desired carbon matrix.

[0049] Get the above treated carbon paper soaked to 3mol / l Fe(NO 3 ) 2 In the solution for 18h, after drying, put it into a quartz boat and place it in the middle of the quartz reactor, and use H 2 / Ar (50% / 50%, the total flow rate is 80ml / min) atmosphere to reduce the catalyst at 500° C. for 8 hours to obtain a carbon matrix-carbon nanotube composite.

[0050] The prepared carbon matrix-carbon nanotube electrocatalyst was heated to 50-60° C. in 2 mol / l HCl solution, and kept stirring for 4 hours, and then washed with ultrapure water until the pH value was equal to 7. Finally filter washed and dried overnight at 120°C.

[0051] Take the above-mentioned purified carbon matrix-carbon nanotube complex and put it in 2mol / l HNO at a ra...

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Abstract

The invention belongs to the technical field of electrocatalysis and energy transformation, in particular to a novel membrane electrode component available for fuel cells, a preparation method and the application thereof. The new membrane electrode component comprises catalyst active component, nanometer carbon material, carbon matrix complex, proton exchange membrane and other components. The specific steps are as follows: pretreatment and surface modification are carried out on the carbon matrix, catalyst needed by the growth of the nanometer carbon material is deposited on the carbon matrix, the carbon source is used for growing the nanometer carbon material on the carbon matrix, purification treatment and surface modification are carried out on the carbon matrix-nanometer carbon material complex, the needed fuel cell catalyst active component is deposited on the carbon matrix-nano carbon material, thereby obtaining the catalyst active component, the nanometer carbon material, the carbon matrix complex, the proton exchange membrane and other components, namely, obtaining the membrane electrode component available for the needed fuel cells. The structure of the membrane electrode component is more even and sequential, can obviously increase the reaction interface of gas-liquid-solid, accelerates the transmission of products and reactants, greatly increases the utilization factor of the catalyst active component, significantly reduces the usage of the catalyst active component, further plays an important role in increasing the power density and the like of the fuel cells.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis and energy conversion, and specifically relates to a novel membrane electrode assembly that can be used in fuel cells, a preparation method and application thereof. Background technique [0002] Fuel cells (Fuel Cells) are efficient, environmentally friendly energy conversion devices that can directly convert chemical energy into electrical energy, and are considered to be one of the most important energy technologies in the 21st century. In recent years, the development direction of vehicle fuel cell technology has gradually become clear, and proton exchange membrane fuel cell is considered to be the most suitable fuel cell technology for vehicle applications. my country also clearly regards fuel cells as cutting-edge technology in the national medium and long-term development program, and clearly proposes to focus on the preparation of key materials for fuel cells and stack integration ...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/96H01M8/02H01M4/90H01M4/92H01M4/88H01M8/10H01M8/12H01M8/1004
CPCY02E60/523Y02E60/525Y02E60/50
Inventor 马建新郑俊生张存满乔锦丽杨代军吕洪汪吉辉
Owner TONGJI UNIV
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