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Electrode catalyst, method for manufacturing the same, and direct alcohol fuel cell

A technology of electrode catalyst and manufacturing method, applied in solid electrolyte fuel cells, fuel cells, fuel cell integration and other directions, can solve the problems of insufficient electrode oxidation, failure to achieve results, and damage to fuel cell functions.

Inactive Publication Date: 2007-02-28
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, it is known that there is a problem that the hydrogen fuel obtained by reforming the raw fuel contains a trace amount of carbon monoxide (CO) or other trace impurities, and especially CO gas impairs the function of the fuel cell.
However, even if an alloy of platinum and ruthenium is used in the electrode, the electrode oxidation of methanol is not sufficient, and even in the electrode oxidation of other alcohol fuels such as ethanol, satisfactory results cannot be achieved.

Method used

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  • Electrode catalyst, method for manufacturing the same, and direct alcohol fuel cell
  • Electrode catalyst, method for manufacturing the same, and direct alcohol fuel cell
  • Electrode catalyst, method for manufacturing the same, and direct alcohol fuel cell

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no. 1 approach

[0164] FIG. 3 shows the configuration of a solid polymer electrolyte fuel cell (PEFC) 20 according to the first embodiment of the present invention. However, in FIG. 3 , the same reference numerals are assigned to the parts corresponding to the parts described above, and description thereof will be omitted.

[0165] Referring to Fig. 3, the solid polymer electrolyte fuel cell 20 has the same structure as that of the cell in Fig. 2, but uses the anode 3A formed as an active ingredient in the electrode catalyst for the direct oxidation of alcohol described in the claims of the present invention. Instead of the anode 3 above.

[0166] That is, in the first embodiment of the present invention, as the above-mentioned anode 3A, a material having a characteristic that a mixture of a substance composed of at least one of molybdenum or a molybdenum compound and platinum, or platinum is used as an electrode catalyst is used. A mixture of ruthenium and ruthenium is used as an active ing...

no. 2 approach

[0178] FIG. 4 is a schematic configuration diagram of a solid polymer electrolyte fuel cell 30 according to a second embodiment of the present invention. However, in FIG. 4 , the same reference numerals are assigned to the previously described parts, and description thereof will be omitted.

[0179]Referring to FIG. 4 , the fuel cell 30 has a flat rectangular parallelepiped shape, and the fuel supply passage 5 is formed in the fuel cell 30 by dividing the cell up and down. Further, the fuel cell 30 has a liquid fuel storage portion that is detachably attached to, for example, a fuel cell constituted by a cylindrical container 7 .

[0180] A small hole 7a is formed on the side surface of the container 7, and the fuel contained in the container 7 is supplied to the fuel supply passage 5 through the small hole 7a. The small hole 7a is sealed by a predetermined sealing method (not shown) before the container 7 is attached to the frame, so that the fuel can be sealed and stored in...

no. 3 approach

[0190] FIG. 5 shows a schematic configuration diagram of a solid polymer electrolyte fuel cell 40 according to a third embodiment of the present invention.

[0191] Referring to FIG. 5, the fuel cell 40 has a structure in which a membrane-electrode composed of the anode 3A, the cathode 4, and the ion exchange membrane 2 as in FIG. The assembled body constitutes a battery, and the upper and lower sides of the battery are sandwiched by bipolar plates 41 and 42 made of dense carbon or the like, and then laminated (stacked). The anode 3A is formed using the electrode catalyst for direct oxidation of alcohol of the present invention as an active ingredient.

[0192] In the structure of FIG. 5 , the alcohol fuel supply hole is formed through the above-mentioned laminated structure, and the alcohol fuel is supplied to the liquid fuel circulation part 5 in each of the above-mentioned cells. On the other hand, an oxidizing agent supply hole is formed through the above-mentioned stacke...

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Abstract

An anode is formed by a metal electrocatalyst including an element mixture made up of platinum and at least one of ruthenium and molybdenum as an active constituent which electrocatalyst is fabricated under vacuum using a vapor phase method, and in this way, the speed of electrode oxidation reaction of alcohol such as methanol, ethanol, and isopropyl alcohol may be substantially increased. Also, by using such an electrocatalyst as the anode, a direct alcohol fuel cell with a high output may be realized using alcohol that is not reformed as fuel.

Description

technical field [0001] The present invention relates to an anode electrode catalyst used in a fuel cell, and in particular, to an electrode catalyst capable of efficiently performing electrode oxidation by directly supplying a fuel containing alcohol as a main component to the anode, and the use of the electrode catalyst for fuel The anode of the battery is a high output direct alcohol fuel cell. Background technique [0002] Fuel cells using hydrogen as fuel can generally obtain high output density, and solid polymer electrolyte fuel cells (PEFC) using hydrogen fuel are particularly expected to be used as power sources or distributed power sources for high-speed moving objects such as electric vehicles. [0003] Generally, a solid polymer electrolyte fuel cell adopts a stack structure in which a plurality of battery cells are stacked to form two electrodes including a fuel electrode (anode) and an oxygen electrode (cathode) and a battery sandwiched between these two electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M8/04H01M4/88H01M8/24H01M4/92H01M8/10
CPCH01M2250/30H01M8/1011Y02B90/18H01M8/1009H01M4/921H01M8/1013H01M4/8871Y02E60/522Y02B90/10Y02E60/50Y02P70/50H01M4/90
Inventor 田中正治木村兴利长谷川爱乃臼井佑马
Owner RICOH KK
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