Water control sheet, gas diffusion sheet, membrane-electrode assembly and polymer electrolyte fuel cell

A solid polymer, membrane electrode assembly technology, used in solid electrolyte fuel cells, fuel cells, fuel cell additives, etc., can solve the problems of insufficient drainage and gas diffusion, and achieve excellent drainage and gas diffusion. , Excellent drainage and excellent operability

Active Publication Date: 2012-08-08
JAPAN VILENE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This moisture management sheet can be used alone and has excellent handleability, but since it is filled with a fluorine-containing resin and / or a conductive agent, the water drainage and gas diffusibility are often insufficient

Method used

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  • Water control sheet, gas diffusion sheet, membrane-electrode assembly and polymer electrolyte fuel cell
  • Water control sheet, gas diffusion sheet, membrane-electrode assembly and polymer electrolyte fuel cell
  • Water control sheet, gas diffusion sheet, membrane-electrode assembly and polymer electrolyte fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Conductive fibers spun from the first spinning solution by electrospinning were piled up on carbon paper placed on the counter electrode (conductive porous sheet, product of Toray Co.; weight per unit area: 84 g / m 2 , thickness 190μm), made of carbon paper-moisture management sheet (average fiber diameter: 380nm, weight per unit area: 6g / m 2 , Thickness: 25μm, porosity 87%) composed of gas diffusion sheet. The electron micrograph of the gas diffusion sheet is shown in figure 1 . figure 1 It was shown that in the conductive fiber, the polyvinylidene fluoride resin contained carbon black inside, and a part of the carbon black was exposed. In addition, the conductive fibers are continuous long fibers, and the long fibers are in an intertwined state during spinning. In addition, even if the moisture management sheet is peeled off from the gas diffusion sheet, the moisture management sheet remains independent and has form stability for single use. In addition, th...

Embodiment 2

[0094] The weight per unit area of ​​the moisture management sheet is 15g / m 2 Besides, a carbon paper-moisture management sheet (average fiber diameter: 480nm, weight per unit area: 15g / m2) was produced in the same manner as in Example 1. 2 , Thickness: 60μm, porosity 86%) composed of gas diffusion sheet. The electron micrograph of the gas diffusion sheet is shown in figure 2 . figure 2 It was shown that in the conductive fiber, the polyvinylidene fluoride resin contained carbon black inside, and a part of the carbon black was exposed. In addition, the conductive fibers are continuous long fibers, and the long fibers are in an intertwined state during spinning. In addition, even if the moisture management sheet is peeled off from the gas diffusion sheet, the moisture management sheet remains independent and has form stability for single use.

Embodiment 3

[0096] Except not using carbon paper, on the stainless steel drum that is used as counter electrode, pile up conductive fiber, by the same method as embodiment 2, made moisture management sheet (average fiber diameter: 420nm, weight per unit area: 15g / m 2 , Thickness: 60μm, porosity 86%). Electron micrographs of the moisture management sheet are shown in image 3 . image 3 It was shown that in the conductive fiber, the polyvinylidene fluoride resin contained carbon black inside, and a part of the carbon black was exposed. In addition, the conductive fibers are continuous long fibers, and the long fibers are in an intertwined state during spinning. In addition, even if the moisture management sheet is peeled off from the stainless steel drum, the moisture management sheet remains independent and has the form stability for single use.

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Abstract

A water control sheet having superior drainage and gas diffusion properties and superior handling characteristics, and a gas diffusion sheet, a membrane-electrode assembly and a polymer electrolyte fuel cell, which utilize the water control sheet, are provided. The water control sheet is independent and located for use adjacent to a catalyst layer of a polymer electrolyte fuel cell, and is formed of a nonwoven fabric containing conductive fibers containing conductive particles at least inside a hydrophobic organic resin. The gas diffusion sheet, the membrane-electrode assembly and the polymer electrolyte fuel cell according to the present invention have the above water control sheet.

Description

technical field [0001] The present invention relates to a moisture control sheet (moisture control sheet), a gas diffusion sheet, a membrane electrode assembly and a solid polymer fuel cell, in particular to an independent moisture management sheet that can be used alone and has shape retention, and a device using the moisture control sheet Gas diffusion sheets, membrane electrode assemblies and solid polymer fuel cells. Background technique [0002] With regard to energy that is used in various ways, finding alternative fuels and saving resources are becoming important issues due to concerns about the depletion of oil resources. Among them, the development of a fuel cell that converts various fuels into chemical energy and extracts it as electric power has been actively continued. [0003] Fuel cells such as "Survey on Technology Trends Regarding Fuel Cells" (Edited by the Technology Survey Division of the Japan Patent Office, May 31, 2001, <url>As shown on page 5 o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04H01M8/02H01M8/10
CPCH01M2008/1095H01M8/0234Y02E60/521H01M4/8647H01M8/0239H01M4/8657H01M4/8652H01M4/8673H01M8/0243H01M8/1002H01M8/1007Y02E60/50H01M4/86H01M4/8636H01M4/8817H01M8/02H01M8/0204H01M8/023H01M8/10
Inventor 伊藤达规铃木真奈美中村达郎
Owner JAPAN VILENE CO LTD
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