Anode for liquid fuel cell, membrane electrode assembly for liquid fuel cell, and liquid fuel cell

A solid polymer and liquid fuel technology, applied in solid electrolyte fuel cells, fuel cell components, fuel cells, etc., can solve the problems of slow fuel diffusion, difficulty in application, and large fuel penetration

Inactive Publication Date: 2005-11-02
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these techniques cannot be said to be sufficient. In addition, compared with hydrogen fuel, the fuel diffusion of methanol liquid fuel is extremely slow, and the fuel penetration is extremely large. Therefore, these results are difficult to apply to DMFC.

Method used

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  • Anode for liquid fuel cell, membrane electrode assembly for liquid fuel cell, and liquid fuel cell
  • Anode for liquid fuel cell, membrane electrode assembly for liquid fuel cell, and liquid fuel cell
  • Anode for liquid fuel cell, membrane electrode assembly for liquid fuel cell, and liquid fuel cell

Examples

Experimental program
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Effect test

Embodiment 1

[0053] (anode)

[0054] The anode is made by means of suction filtration. As a fibrous supported catalyst, the selected one has an average diameter of 250nm and a specific surface area of ​​300m 2 / g, the pore volume is 0.3cm 3 / g, with an average aspect ratio of 50 herringbone-shaped carbon nanofibers with 40% by weight of PtRu 1.5 Microparticles, and as a granular supported catalyst, the selected primary particle has an average diameter of 50nm and a specific surface area of ​​50m 2 / g, DBP oil absorption of 50ml / 100g carbon black with 40% PtRu 1.5 . First, 30 mg of fibrous supported catalyst and 45 mg of granular supported catalyst were weighed, 150 g of pure water was added, stirred sufficiently, dispersed and heated to obtain a mixed solution with a solid content of 0.05% by weight and a temperature of 85°C. 10cm through hydrophobic treatment 2 The obtained mixed liquid was suction-filtered with a porous carbon paper (350 μm, manufactured by Toray Industries Co., Lt...

Embodiment 2

[0064] The average diameter of carbon nanofibers is set to 200nm, and the specific surface area is set to 150m 2 / g, the average aspect ratio is set to 30, the average primary particle diameter of carbon black is set to 50nm, and the specific surface area is set to 150m 2 / g, DBP oil absorption are set to 100ml / 100g, the fibrous supported catalyst and the granular supported catalyst are respectively set to 45mg and 30mg, and the solid content of the mixture of the fibrous supported catalyst and the granular supported catalyst and water is set as The anode was fabricated as described in Example 1 above except that the temperature was set at 25° C. and the amount of the proton conductive material NAFION (manufactured by DuPont) deposited at 25 mg. From the obtained anodes, a DMFC was fabricated as described in Example 1 above, and the anodes were evaluated. The results are shown in Table 1 below.

Embodiment 3

[0066] Set the average diameter of carbon nanofibers to 150nm and the specific surface area to 400m 2 / g, the average aspect ratio is set to 80, the average primary particle diameter of carbon black is set to 30nm, and the specific surface area is set to 250m 2 / g, DBP oil absorption are set to 175ml / 100g, the fibrous supported catalyst and the granular supported catalyst are respectively set to 60mg and 25mg, and the solid content of the mixture of the fibrous supported catalyst and the granular supported catalyst and water is set as An anode was fabricated as described in Example 1 above except that the temperature was set at 90° C. and the deposition amount of the proton conductive material NAFION (manufactured by DuPont) was set at 20 mg. From the obtained anodes, a DMFC was fabricated as described in Example 1 above, and the anodes were evaluated. The results are shown in Table 1 below.

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Abstract

An anode for liquid fuel cell includes a current collector and a catalyst layer, in which the catalyst layer has a porosity in a range of 20 to 65%, and a volume of pores of which diameter ranges from 50 to 800 nm is 30% or more of a pore volume of the catalyst layer, the catalyst layer has a pore diameter distribution having a peak in a range of 100 to 800 nm, and the catalyst layer comprises fibrous supported catalysts and granular supported catalysts, the fibrous supported catalysts contain carbon nanofibers having a herringbone or platelet structure, and catalyst particles carried on the carbon nanofibers, and the granular supported catalysts contain carbon black particles and catalyst particles carried on the carbon black particles.

Description

[0001] This application is based on and claims priority from prior Japanese Patent Application No. 2004-129841 filed on April 26, 2004, the entire contents of which are hereby incorporated by reference into this application. technical field [0002] The invention relates to an anode of a solid polymer fuel cell for liquid fuel, a membrane electrode assembly for a solid polymer fuel cell for liquid fuel, and a solid polymer fuel cell for liquid fuel. Background technique [0003] A fuel cell is a device in which fuel such as hydrogen or methanol is electrochemically oxidized in the battery, thereby directly converting the chemical energy of the fuel into electrical energy and taking out the electrical energy. Unlike thermal power generation, this fuel cell does not generate NO from the combustion of fuel X and SO X and other substances, so it has attracted much attention as a clean power supply source. In particular, the direct methanol solid polymer fuel cell (DMFC), compa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/96H01M4/86H01M4/88H01M4/92H01M8/00H01M8/02H01M8/10
CPCH01M4/926Y02E60/523H01M4/8605H01M8/1009H01M4/921H01M8/1002H01M8/1007Y02E60/50A47F5/112
Inventor 梅武赤坂芳浩米津麻纪中野义彦大图秀行
Owner KK TOSHIBA
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