Gas diffusion electrode substrate for fuel cell, membrane electrode assembly, and fuel cell

A gas diffusion electrode, membrane electrode assembly technology, applied in the direction of fuel cells, battery electrodes, fuel cell components, etc., can solve the problems of insufficient suppression, no improvement in clogging, and achieve good drainage and high power generation. Good performance and thermal conductivity

Active Publication Date: 2014-08-06
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, the technology described in Patent Document 1 has the following problems: the suppression of flooding and drying up is not sufficient, and clogging has not been improved at all.

Method used

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  • Gas diffusion electrode substrate for fuel cell, membrane electrode assembly, and fuel cell
  • Gas diffusion electrode substrate for fuel cell, membrane electrode assembly, and fuel cell
  • Gas diffusion electrode substrate for fuel cell, membrane electrode assembly, and fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0152] The microporous part [A] of Example 1 is made using a screen plate, and it is formed into a grid shape consisting of straight lines with a line width of 0.5 mm and a line interval of 0.7 mm ( figure 1 The pattern represented by the lattice shape). Others were the same as the methods described in and to obtain a gas diffusion electrode substrate. When the area ratio of the micropore portion [A] of this gas diffusion electrode substrate was measured, the area ratio was 66%. As a result of evaluating the power generation performance of this gas diffusion electrode base material, the clogging resistance was extremely good. The output voltage is 0.35V (operating temperature is 65°C, humidification temperature is 70°C, current density is 2.2A / cm 2 ), critical temperature is 91°C (humidification temperature is 70°C, current density is 1.2A / cm 2 ), as recorded in Table 1, both overflow resistance and dry-out resistance are good. In addition, the coating speed of the carb...

Embodiment 2

[0154] The microporous portion [A] of Example 2 was produced using a screen plate to form a grid-like pattern consisting of straight lines with a line width of 0.1 mm and a line interval of 1.8 mm. Others were the same as the methods described in and to obtain a gas diffusion electrode substrate. When the area ratio of the micropore portion [A] of the gas diffusion electrode substrate was measured, the area ratio was 10%. As a result of evaluation of the power generation performance of this gas diffusion electrode base material, the clogging resistance was good. The output voltage is 0.38V (operating temperature is 65°C, humidification temperature is 70°C, current density is 2.2A / cm 2 ), critical temperature is 90°C (humidification temperature is 70°C, current density is 1.2A / cm 2 ), as recorded in Table 1, both overflow resistance and dry-out resistance are good.

Embodiment 3

[0156] The microporous portion [A] of Example 3 was produced using a screen plate to form a grid-like pattern consisting of straight lines with a line width of 0.5 mm and a line interval of 2 mm. Others were the same as the methods described in and to obtain a gas diffusion electrode substrate. When the area ratio of the microporous portion [A] of this gas diffusion electrode substrate was measured, the area ratio was 36%. As a result of evaluating the power generation performance of this gas diffusion electrode base material, the clogging resistance was extremely good. The output voltage is 0.38V (operating temperature is 65°C, humidification temperature is 70°C, current density is 2.2A / cm 2 ), critical temperature is 92°C (humidification temperature is 70°C, current density is 1.2A / cm 2 ), as recorded in Table 1, both overflow resistance and dry-out resistance are good.

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Abstract

To provide a gas diffusion electrode substrate for a fuel cell having low in-plane air permeability and favorable water discharge performance, and in which a high power-generating performance can be obtained across a wide temperature region from low to high temperatures. A gas diffusion electrode substrate for a fuel cell, characterized in comprising a microporous part [A], an electrode substrate, and a microporous part [B] arranged in the sequence listed, the microporous part [A] having an area ratio in the range of 5 to 70%, and the microporous part [B] having an area ratio in the range of 80 to 100%.

Description

Technical field [0001] The invention involves gas diffusion electrode substrates for fuel cells, especially solid polymer fuel cells.More detailed, it involves a gas diffusion electrode substrate.) It is also excellent. It can show high power generation performance within low temperature to high temperature wide temperature range, and mechanical characteristics, electrical conductivity, and heat conduction. Background technique [0002] Solid polymer fuel cells are usually composed of partitions, gas diffusion electrode substrates, catalyst layers, electrolytic membranes, catalyst layers, gas diffusion electrode substrates, and partitionsThe battery is a fuel gas containing hydrogen containing the anode, and the oxygen -containing gas -containing gas -containing gas -containing gas -containing gas -containing gas -containing gas, which is obtained by electromic chemical reactions between the poles.Gas diffusion electrode substrate needs to have the following nature: high gas diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/96B01J23/42H01M4/86H01M4/88H01M8/02H01M8/10
CPCY02E60/521H01M8/0243H01M4/8605H01M8/1002Y02E60/50H01M2008/1095H01M4/8835H01M2300/0082H01M8/1007H01M8/0245H01M8/1004H01M8/0234H01M8/0239
Inventor 宇都宫将道釜江俊也
Owner TORAY IND INC
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