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Membrane-electrode junction for polymer electrolyte fuel cell, manufacturing method therefor, and polymer electrolyte fuel cell

A technology of membrane-electrode assembly and solid polymer, applied in the direction of solid electrolyte fuel cells, fuel cells, battery electrodes, etc., can solve the problems of high cost of fuel cell systems, achieve high power generation characteristics, and inhibit swelling

Inactive Publication Date: 2014-10-22
TOPPAN PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In solid polymer fuel cells, in order to ensure the proton conductivity and conductivity of the proton-conducting polymer in the polymer electrolyte membrane and the electrode catalyst layer, it is necessary to humidify the membrane-electrode assembly, but for humidification, a humidifier is required , which leads to higher cost of the fuel cell system as a whole

Method used

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  • Membrane-electrode junction for polymer electrolyte fuel cell, manufacturing method therefor, and polymer electrolyte fuel cell
  • Membrane-electrode junction for polymer electrolyte fuel cell, manufacturing method therefor, and polymer electrolyte fuel cell
  • Membrane-electrode junction for polymer electrolyte fuel cell, manufacturing method therefor, and polymer electrolyte fuel cell

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no. 1 Embodiment approach

[0036] Next, a first embodiment of the present invention (hereinafter referred to as "the present embodiment") will be described with reference to the drawings. It should be noted that this embodiment is an example of the present invention and does not limit the present invention.

[0037] The present invention provides a solid polymer fuel cell membrane electrode assembly for a solid polymer fuel cell, and a method for manufacturing a solid polymer fuel cell membrane electrode assembly for a solid polymer fuel cell (manufacturing method).

[0038] Specifically, in the present invention, the power generation characteristics of the membrane electrode assembly in a high-temperature and low-humidity environment were intensively studied, and as a result, it was found that the resistance value Ri of the proton-conducting polymer in the electrode catalyst layer has a great influence on the power generation performance. big impact. Therefore, in the present invention, by setting th...

Embodiment 1

[0076] Examples and comparative examples of the present invention will be described below.

[0077] (Example 1)

[0078] A carbon-supported platinum catalyst (trade name: TEC10E50E, manufactured by Tanaka Kikinzoku Kogyo Co., Ltd.) was mixed with a mixed solvent of water and ethanol, and dispersed by a planetary ball mill to prepare a carbon-supported catalyst dispersion. Then, a proton-conducting polymer (Nafion: Nafion, a registered trademark of DuPont) dispersion was mixed with the carbon-supported catalyst dispersion so that the ratio x of the proton-conducting polymer to the carbon carrier was 1, and a planetary A ball mill was used for dispersion treatment to prepare catalyst slurry. Then, the prepared catalyst slurry is coated into a rectangle on the surface of the PTFE membrane by a slot die coater, and then, the PTFE membrane coated with the catalyst slurry is put into a warm air oven at 70° C. to dry it. until the catalyst slurry loses its viscosity. Further, the ...

Embodiment 2

[0081] The membrane electrode assembly of Example 2 was obtained in the same manner as in Example 1, except that an ultrasonic homogenizer was used instead of the planetary ball mill in the preliminary dispersion process.

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Abstract

Provided are a membrane-electrode junction for a polymer electrolyte fuel cell having high power-generating characteristics in a high-temperature, low-humidity environment, and a polymer electrolyte fuel cell using the same. In this membrane-electrode junction for a polymer electrolyte fuel cell provided with electrode catalyst layers (2, 3), which include at least a proton-conducting polymer and catalyst carrier carbon, on both faces of a polymer electrolyte membrane (4), the resistance (Ri) of the proton-conducting polymer of the electrode catalyst layers (2, 3) is at least 2 Omegacm2 but no more than 5 Omegacm2 under the measurement conditions of 20% relative humidity and an AC inductance of 10 kHz to 100 Hz.

Description

technical field [0001] The present invention relates to a membrane electrode assembly for a solid polymer fuel cell, a method for producing the same, and a solid polymer fuel cell. Background technique [0002] A fuel cell is a power generation system that uses hydrogen and oxygen as fuel to generate electricity through the reverse reaction of water electrolysis. Compared with conventional power generation methods, it has characteristics such as high efficiency, low environmental load, and low noise, and is attracting attention as future green energy. Among them, solid polymer fuel cells that can be used at around room temperature are expected to be used in vehicle power supplies, household stationary power supplies, etc., and various research and development related to solid polymer fuel cells have been conducted in recent years. Examples of problems for practical use include improvement of battery performance such as power generation performance and durability, and reduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86B01J23/42H01M4/88H01M8/02H01M8/10
CPCH01M2008/1095Y02E60/521H01M4/8668H01M2220/20H01M8/1004H01M4/8605H01M4/881H01M4/8828H01M4/9083H01M4/926H01M4/8814H01M2250/20H01M4/8652H01M4/8882Y02E60/50Y02P70/50Y02T90/40H01M8/1023H01M8/1039H01M2300/0082
Inventor 小泽麻都香
Owner TOPPAN PRINTING CO LTD