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Electrode catalyst layer and solid polymer fuel cell

An electrode catalyst layer and polymer electrolyte technology, which is applied in the field of solid polymer fuel cells, can solve the problems of hindering gas overflow and reducing the output power of fuel cells, and achieves improved gas diffusivity, improved drainage, and high output power. Effect

Active Publication Date: 2020-06-05
TOPPAN PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the fuel cell generates a lot of produced water during high-output operation, the produced water overflows the electrode catalyst layer and the gas diffusion layer to prevent the flooding of the gas supply.
When flooding occurs, there is a problem that the output power of the fuel cell is significantly reduced

Method used

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  • Electrode catalyst layer and solid polymer fuel cell
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  • Electrode catalyst layer and solid polymer fuel cell

Examples

Experimental program
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Effect test

Embodiment 1-1

[0071] The electrode catalyst layer was formed such that the thickness and density of the electrode catalyst layer became the values ​​shown in Table 2.

[0072] First, 20 g of platinum-supported carbon (TEC10E50E, manufactured by Tanaka Kikinzoku Co., Ltd.) was put in a container, mixed with water, and 1-propanol, electrolyte (Nafion (registered trademark) dispersion liquid, "Wako Pure Pharmaceutical Co., Ltd." ), 10 g of carbon nanofibers (manufactured by "Showa Denko" Co., Ltd., trade name "VGCF", fiber diameter about 150 nm, fiber length about 10 μm) as a fibrous substance were stirred to obtain a catalyst layer slurry.

[0073] The obtained catalyst layer slurry was coated on a polymer electrolyte membrane (manufactured by DuPont, Nafion 212) by a die coating method, and dried in an oven at 80° C., thereby obtaining the electrode catalyst layer of Example 1-1. membrane electrode assembly.

Embodiment 1-2

[0075] The membrane electrode assembly having an electrode catalyst layer of Example 1-2 was obtained in the same manner as in Example 1-1, except that carbon nanotubes (fiber diameter about 1 nm, fiber length about 1 μm) were used as the fibrous substance.

Embodiment 1-3

[0077] The membrane electrode assembly having the electrode catalyst layer of Example 1-3 was obtained in the same manner as in Example 1-1 except that the drying temperature was increased.

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Abstract

Provided are: an electrode catalyst layer for solid polymer fuel cells, which is capable of having high output, while being able to have improved water discharge performance and improved gas diffusibility; and a solid polymer fuel cell which is provided with this electrode catalyst layer for solid polymer fuel cells. Electrode catalyst layers (2, 3) according to one embodiment of the present invention are bonded to a polymer electrolyte membrane (1), and comprise a catalyst (13), carbon particles (14), a polymer electrolyte (15) and a fibrous material (16). The electrode catalyst layers (2, 3)have a density of from 500 mg / cm3 to 900 mg / cm3 (inclusive); or alternatively, the electrode catalyst layers (2, 3) have a density of from 400 mg / cm3 to 1,000 mg / cm3 (inclusive), and the mass of thepolymer electrolyte (15) is within the range of from 10% by mass to 200% by mass (inclusive) relative to the total mass of the carbon particles (14) and the fibrous material (16).

Description

technical field [0001] The present invention relates to an electrode catalyst layer constituting a membrane electrode assembly for a solid polymer fuel cell, and a solid polymer fuel cell including the electrode catalyst layer. Background technique [0002] In recent years, fuel cells have attracted much attention as an effective solution to environmental and energy problems. A fuel cell uses an oxidant such as oxygen to oxidize a fuel such as hydrogen and converts the accompanying chemical energy into electrical energy. [0003] Fuel cells can be classified into alkaline type, phosphoric acid type, polymer type, molten carbonate type, solid oxide type, etc. according to the type of electrolyte. Solid polymer fuel cells (PEFC) are expected to be applied to portable power sources, household power sources, and vehicle power sources due to their low-temperature operation, high output power density, and miniaturization and weight reduction. [0004] A solid polymer fuel cell (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M8/10H01M8/1004B01J23/42
CPCH01M4/86H01M8/1004B01J23/42H01M2008/1095H01M4/8673H01M4/8663H01M4/8605H01M4/9075H01M4/926Y02E60/50H01M4/8828H01M8/10
Inventor 岸克行
Owner TOPPAN PRINTING CO LTD
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