Catalyst layer for solid polymer fuel cells, membrane electrode assembly, and solid polymer fuel cell

A solid polymer, catalyst layer technology, applied in solid electrolyte fuel cells, fuel cells, battery electrodes, etc., can solve the problems of reducing the output power of fuel cells, hindering gas supply, etc., to improve utilization efficiency, achieve output, high output effect

Pending Publication Date: 2021-10-26
TOPPAN PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a large amount of produced water is generated during high-power operation, so flooding occurs, that is, water overflows into the catalyst layer or gas diffusion layer, thereby hindering the supply of gas
Therefore, in the fuel cell of the prior art, there is a problem that the output power of the fuel cell is sometimes remarkably reduced.

Method used

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  • Catalyst layer for solid polymer fuel cells, membrane electrode assembly, and solid polymer fuel cell
  • Catalyst layer for solid polymer fuel cells, membrane electrode assembly, and solid polymer fuel cell
  • Catalyst layer for solid polymer fuel cells, membrane electrode assembly, and solid polymer fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] In Example 1, a platinum-supported carbon catalyst (TEC10E50E, manufactured by Tanaka Kikinzoku Industries Co., Ltd.), water, 1-propanol, a polymer electrolyte (Nafion (registered trademark) dispersion, manufactured by Wako Pure Chemical Industries, Ltd.), A catalyst ink was prepared by mixing with a vapor-phase grown fibrous substance (VGCF (registered trademark), manufactured by Showa Denko Co., Ltd.), and performing a dispersion treatment at 500 rpm for 30 minutes using a planetary ball mill. At this time, zirconia balls with a diameter of 5 mm are added to about 1 / 3 of the zirconia container. It should be noted that the mass of the polymer electrolyte is 100% by mass relative to the total mass of the carbon particles and the fibrous substance, the mass of the fibrous substance is 100% by mass relative to the mass of the carbon particles, and the solid content concentration is 10%. Catalyst inks were made in this way.

[0121] The prepared catalyst ink was coated on...

Embodiment 2

[0123] In the preparation of catalyst ink, multilayer carbon nanotubes (diameter 60-100nm, length > 5μm, manufactured by "Tokyo Chemical Industry Co., Ltd.") are used instead of carbon nanofibers (VGCF(registered trademark)-H, "Showa Denko Co., Ltd. )" production), the membrane electrode assembly of Example 2 was obtained by the same method as in Example 1 except that.

Embodiment 3

[0125] The membrane electrode assembly of Example 3 was obtained by the same method as in Example 1 except that the amount of carbon nanofibers was set to 1 / 2 of that of Example 1 when preparing the catalyst ink.

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Abstract

The present invention provides a catalyst layer for solid polymer fuel cells, a membrane electrode assembly, and a solid polymer fuel cell that improve drainage properties and gas diffusion properties, suppress cracks in the catalyst layer, improve catalyst utilization efficiency, increases energy conversion efficiency at high output, and provide good durability. This catalyst layer for solid polymer fuel cells includes a catalyst 21, carbon particles 22, a polymer electrolyte 23, and a fibrous substance 24. The carbon particles 22 support the catalyst 21. The catalyst layer for solid polymer fuel cells has gaps 25 and the frequency of gaps 25 that have a cross-sectional area of at least 10,000 nm2 among gaps 25 observed in a cross-section in the thickness direction intersecting the surface of the catalyst layer for solid polymer fuel cells is 13%-20%.

Description

technical field [0001] The present invention relates to a catalyst layer for a polymer fuel cell, a membrane electrode assembly, and a solid polymer fuel cell. Background technique [0002] In recent years, fuel cells have attracted much attention as an effective solution to environmental and energy problems. A fuel cell refers to a battery that uses an oxidant such as oxygen to oxidize 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 (PEFC) has a structure in which a polymer elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/96H01M8/0273H01M8/10
CPCY02E60/50H01M8/1018H01M8/1004H01M2300/0082H01M4/9083H01M4/92H01M4/8647H01M2004/8678H01M4/8807H01M4/8803H01M4/8657
Inventor 小山浩晃小泽麻都香
Owner TOPPAN PRINTING CO LTD
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