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Membrane electrode assembly and fuel cell system including the same

A membrane electrode assembly and conductive material technology, applied in the direction of fuel cells, solid electrolyte fuel cells, fuel cell components, etc., can solve problems such as increased contact resistance, reduced fuel cell efficiency, and increased resistance

Inactive Publication Date: 2007-03-28
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] However, since the current collector is arranged away from the catalyst layer and the diffusion layer, this leads to an increase in the contact resistance between the current collector and the electrode, and the concomitant migration of electrons generated in the catalyst layer to the current collector via the fuel diffusion layer and the support layer. increase in the resistance of the electrical body, and can lead to a decrease in fuel cell efficiency
[0016] Moreover, in order for the current generated in the catalyst layer to be transported to the current collector, conductive materials should be used for both the diffusion layer and the support layer, thereby creating a limitation on the choice of materials, which is directly related to the limited performance of the fuel cell

Method used

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  • Membrane electrode assembly and fuel cell system including the same
  • Membrane electrode assembly and fuel cell system including the same
  • Membrane electrode assembly and fuel cell system including the same

Examples

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preparation example Construction

[0063] The preparation of the fuel cell can be performed using any conventional method known in various literatures, and thus, a detailed explanation of the preparation method will not be given here.

[0064] According to the embodiment of the present invention, by forming a current collector between the catalyst layer and the fuel diffusion layer in each electrode, the migration distance of electrons is shortened to minimize the resistance; by forming a conductive collector between the current collector and the catalyst layer The electric protection layer can reduce the resistance caused by the poor contact between the current collector and the catalyst layer; and the current generated in the catalyst layer can be gathered on the current collector without passing through the fuel diffusion layer, so that the resistance able to minimize.

[0065] In addition, the fuel diffusion layer is formed on the current collector so that the fuel diffusion layer can be composed of various...

Embodiment 1

[0069] Preparation of anode catalyst layer

[0070] 0.2 g of Pt-Ru powder and 0.6 g of deionized water were mixed with a stirrer so that the deionized water penetrated between the particles of the Pt-Ru powder. 0.2 g of isopropanol (IPA) was added to the product, and after mechanical stirring, 0.2 g of deionized water and 0.706 g of 5 wt% Nafion solution were added to the resulting mixture. The final mixture was stirred for about 100 minutes using an ultrasonic shaker to prepare a slurry for forming an anode catalyst layer.

[0071] Here, the density of the Pt-Ru catalyst loaded on the anode is 8 mg / cm 2 .

[0072] By spraying, the slurry for forming the anode catalyst layer was coated on a piece of carbon paper Toray30 (Toray Industries, Inc.) with a thickness of 100 μm, and dried. As a protective layer for current collectors. Thus, an anode catalyst layer is formed on the current collector protection layer.

[0073] Preparation of Cathode Catalyst Layer

[0074] The...

Embodiment 2

[0085] A membrane electrode assembly was prepared in the same manner as in Example 1, except that Nafion 115 membrane was used as the electrolyte membrane.

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Abstract

A membrane electrode assembly for a fuel cell, in which electrical resistance is minimized by including a current collector between a catalyst layer and a fuel diffusion layer inside electrodes to shorten the electron transfer distance, and in which corrosion of the current collector due to direct contact between the current collector and the catalyst in the catalyst layer is prevented by including an electrically conductive current collector-protecting layer between the current collector and the catalyst layer, and a fuel cell including the membrane electrode assembly which can stably exhibit constant performance for a prolonged period of time, and which has excellent efficiency due to low electrical resistance.

Description

technical field [0001] The present invention relates to a membrane electrode assembly for a fuel cell and a fuel cell comprising the membrane electrode assembly, specifically, the present invention relates to a membrane electrode assembly for a fuel cell and a fuel cell comprising the membrane electrode assembly, The membrane electrode assembly shortens the electron migration distance and minimizes the resistance by arranging a current collector between the catalyst layer and the fuel diffusion layer in the electrode, and by arranging a conductive current collector between the current collector and the catalyst layer A protective layer to prevent corrosion of the current collector due to direct contact between the current collector and the catalyst in the catalyst layer. Background technique [0002] The increased penetration of portable electronic devices and radio communication equipment has led to increased interest and ongoing research in the development of fuel cells fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M8/02H01M8/10
CPCY02E60/521H01M8/0232H01M8/1004H01M8/0234H01M8/0236H01M8/0247Y02E60/523H01M8/0239H01M8/0243H01M8/0208H01M8/0269H01M8/021H01M8/0245Y02E60/522Y02E60/50H01M4/86H01M8/02B82Y30/00
Inventor 吴柾旻金惠庆张赫
Owner SAMSUNG SDI CO LTD