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Cathode catalyst for fuel cell, membrane-electrode assembly for fuel cell comprising same and fuel cell system comprising same

A technology of fuel cell system and cathode catalyst, which is used in fuel cell parts, fuel cells, battery electrodes, etc.

Inactive Publication Date: 2007-09-26
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The polymer electrolyte membrane fuel cell has the advantage of high energy density, but it still has the problem that hydrogen gas needs to be handled carefully, and additional equipment is required, such as for reforming methane, methanol, natural gas, etc. to produce gas used as fuel hydrogen fuel reformer

Method used

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  • Cathode catalyst for fuel cell, membrane-electrode assembly for fuel cell comprising same and fuel cell system comprising same
  • Cathode catalyst for fuel cell, membrane-electrode assembly for fuel cell comprising same and fuel cell system comprising same

Examples

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Effect test

Embodiment 1

[0074] By mixing 1 g of Ru(CH 3 COO) 3 , 0.5g of W(CH 3 COO) 3 , 15 g CH 3 CSNH 2 , and 12ml of Triton X-100, and stirred with a magnetic stirring bar for 15 minutes to prepare the first emulsion.

[0075] By mixing 16 g of C in a flask 6 h 12 (cyclohexane), and 8ml of Triton X-100, and stirred with a magnetic stirring bar for 15 minutes to prepare the second emulsion.

[0076] The prepared first and second emulsions were added to the flask and mixed by swirling the magnetic stir bar therein for 15 minutes. The flask containing the mixture of the first and second emulsions was then heated to 60°C and maintained at 60°C for 8 hours, then cooled to room temperature. Next, the mixture in the flask was filtered to obtain a precipitate. The precipitate was washed three times with distilled water and ethanol, and dried at 60° C. for 4 hours to obtain nanowire-shaped Ru-W-S. The Ru-W-S contains 54 atomic % of Ru, 24 atomic % of W, and 22 atomic % of S, and has 100m 2 / g sp...

Embodiment 2

[0079] By mixing 1.6 g of H in the flask 2 RhCl 4 , 0.9g of Mo(CO) 6 , 15 g CH 3 CSNH 2 , and 12ml of Triton X-100, and stirred for 15 minutes with a magnetic stirring bar to prepare the first emulsion.

[0080] By mixing 16 g of C in a flask 6 h 12 (cyclohexane), and 8ml of Triton X-100, and stirred with a magnetic stirring bar for 15 minutes to prepare the second emulsion.

[0081] The prepared first and second emulsions were added to the flask and stirred with a magnetic stir bar therein for 15 minutes to effect mixing. The flask containing the first and second emulsion mixtures was then heated to 60°C and held at 60°C for 8 hours, then cooled to room temperature. Next, the mixture in the flask was filtered to obtain a precipitate. The precipitate was washed 3 times with distilled water and ethanol, and dried at 60°C for 4 hours to obtain nanowire-shaped Rh-Mo-S. The Rh-Mo-S contains 67 atomic percent Rh, 23 atomic percent Mo, and 10 atomic percent S, and has 110m ...

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Abstract

The present invention relates to a cathode catalyst for a fuel cell, and a membrane-electrode assembly for a fuel cell and a fuel cell system comprising the same. The cathode catalyst for a fuel cell includes A-B-S, where A is selected from the group consisting of Ru, Rh, and combinations thereof, the B is selected from the group consisting of W, Mo, and combinations thereof, and the A-B-S is shaped as a nanowire. Since the cathode catalyst for a fuel cell of the present invention has excellent activity and selectivity for reduction of an oxidant, it can improve performance of a membrane-electrode assembly and a fuel cell system including the same.

Description

technical field [0001] The invention relates to a cathode catalyst for a fuel cell, a fuel cell membrane electrode assembly and a fuel cell system containing it. More specifically, the present invention relates to a cathode catalyst having high activity for reduction reaction of an oxidizing agent and capable of improving the performance of a fuel cell membrane electrode assembly, and a membrane electrode assembly and a fuel cell system comprising the same. Background technique [0002] A fuel cell is a power generation system that generates electricity through the electrochemical redox reaction of an oxidant with hydrogen in a fuel such as a hydrocarbon-based material (eg, methanol, ethanol, natural gas). [0003] Representative fuel cells include polymer electrolyte membrane fuel cells (PEMFC) and direct oxidation fuel cells (DOFC). The direct oxidation fuel cell includes a direct methanol fuel cell using methanol as fuel. [0004] The polymer e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/049H01M4/90H01M4/88H01M4/86H01M8/02H01M8/00
CPCH01M8/1011H01M4/8626H01M2004/8689Y02E60/523H01M4/8807H01M2300/0082H01M4/921H01M8/1004Y02E60/50H01M4/90B01J27/13B01J27/047B82Y30/00
Inventor 亚历克西·亚历山德罗维克瑟罗夫郭灿李时贤
Owner SAMSUNG SDI CO LTD