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Composite porous membrane, method for production thereof, solid polymer electrolyte membrane, and fuel cell

A technology of polymer film and porous film, which is applied in the field of functional film, can solve the problems of easy short circuit, pinhole, cross leakage and other problems of electrodes, and achieve the effect of improving current-voltage characteristics, enhancing strength and high adhesion

Inactive Publication Date: 2008-07-16
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a solid polymer electrolyte membrane having too small a membrane thickness has the following problems: pinholes occur in the process of manufacturing the membrane; the membrane is torn or broken during electrode formation; short circuits are easily generated between electrodes
Therefore, such solid polymer electrolyte membranes often have reliability issues, such as pressure resistance, or cross-leakage due to swelling and deformation of the polymer membrane due to wetting during differential pressure operation.

Method used

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  • Composite porous membrane, method for production thereof, solid polymer electrolyte membrane, and fuel cell
  • Composite porous membrane, method for production thereof, solid polymer electrolyte membrane, and fuel cell
  • Composite porous membrane, method for production thereof, solid polymer electrolyte membrane, and fuel cell

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Embodiment

[0071] A highly functional composite electrolyte membrane for a fuel cell including a porous support was fabricated by performing membrane processing using an ultrashort pulse laser according to the procedure shown in FIG. 1 . In a specific manufacturing method, a polymer membrane containing a fibrous material (preferably non-conductive) whose fiber length is larger than the pore size to be processed is irradiated with an ultrashort pulse laser to form a porous membrane with a structure as shown in FIG. 1 .

[0072] The fiber material used preferably has 10 -5 to 10 -2 Volume resistivity in Ω / cm. But by mixing with membrane material, insulation can be improved. Therefore, usable materials are not limited to this material. The fiber material preferably has a fiber length of 1 μm to 10 μm and an aspect ratio (average length÷average diameter) of 10 or more in consideration of film processing and maintaining conductivity.

[0073] The polyetheretherketone (PEEK) film mixed wit...

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Abstract

It is intended to provide a composite porous membrane comprising a fibrous filler-containing polymer film or sheet, characterized by having a large number of pores with an exposed fibrous filler formed by irradiation with an ultra-short pulse laser with a pulse width of 10 -9 seconds or less, and to provide a polymer electrolyte membrane having the pores that are filled with a polymer electrolyte. According to the present invention, an inorganic-organic or organic-organic composite porous membrane can be obtained, which can be prepared as a thin membrane and is highly durable with high strength and a reduced cross-leak of fuel gas. This composite porous membrane can be used as a solid polymer electrolyte membrane to obtain a fuel cell improved in output voltage and electric current density.

Description

technical field [0001] The present invention relates to a variety of functional membranes, particularly inorganic-organic or organic-organic composite porous membranes, which are most suitable for solid polymer electrolytes used in solid polymer fuel cells, water electrolysis devices, etc. The present invention also It relates to a manufacturing method of the porous membrane, and a fuel cell including the composite porous membrane. In particular, the present invention relates to a solid polymer electrolyte membrane exhibiting excellent durability when used in a fuel cell without breakage caused by repeated changes in operating conditions, and to a method of manufacturing the same. Background technique [0002] A solid polymer electrolyte fuel cell has a structure including a solid polymer electrolyte membrane as an electrolyte and electrodes connected to both sides of the membrane. [0003] When used as a fuel cell, the polymer solid electrolyte membrane itself must have lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02C08J5/04H01B1/06H01B13/00H01M8/10
CPCB01D67/0032B01D67/0088H01M8/1086H01M8/1072Y02E60/521H01M8/1039H01M2300/0091C08J5/04H01M8/1023H01B1/122H01M8/0291C25B13/04B01D69/148B01D69/141B01D67/0079H01M2300/0082C08J5/2275H01M8/1062C08J2327/18H01M8/106B01D71/36B01D2323/21B01D2323/30B01D2323/34H01M8/0289Y02P70/50Y02E60/50B01D71/701
Inventor 片山幸久
Owner TOYOTA JIDOSHA KK
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