Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Porous membrane, process for producing porous membrane, solid polymer electrolyte membrane, and fuel cell

A polymer material, porous membrane technology, applied in the field of functional membranes, can solve the problems of short-circuiting, pinholes, cross-leakage and other problems in electrodes, and achieve the improvement of current-voltage characteristics, enhance strength, and reduce fuel gas cross-leakage. Effect

Inactive Publication Date: 2008-07-16
TOYOTA JIDOSHA KK
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Porous membrane, process for producing porous membrane, solid polymer electrolyte membrane, and fuel cell
  • Porous membrane, process for producing porous membrane, solid polymer electrolyte membrane, and fuel cell
  • Porous membrane, process for producing porous membrane, solid polymer electrolyte membrane, and fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0078] Examples of the present invention are shown below.

[0079] Each film of PEEK, PEI, and PSF manufactured by Sankyo Kasei Co., Ltd., PPSU manufactured by Solvay, and PPS manufactured by Toray Industries, Inc. was irradiated with laser light with a pulse width of 150 fs and an output power of 0.03 W at the focal position 0.01 seconds to 1.0 seconds to form a porous membrane with through-holes 5 to 30 microns in diameter.

[0080] 1 to 5 show examples of laser microscopic observation results on the front and back sides of each porous film, respectively. Figure 1 shows the laser irradiation surface of PEEK (55 micron film thickness) obtained in the examples, where the upper column represents the irradiation time from left to right from 0.01 second to 0.04 second (in increments of 0.01 second), and the lower column from left to right Indicates the focal length from 0 mm to 0.15 mm (in increments of 0.05 mm). Fig. 2 shows the laser irradiation surface of PEI (50 mm film thi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
pore sizeaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The present invention aims to provide a porous membrane comprising a membrane or sheet made of a polymer or inorganic material, characterized by having a large number of pores with a pore size of 0.1 to 100 microns, by using a pulse width of 10-9 seconds or less and The output power at the focus position is 0.001 to 10W ultrashort pulse laser irradiation to form pores, and the present invention also provides a polymer electrolyte membrane having pores filled with a polymer electrolyte. The polymer electrolyte membrane can be made into a thin film form and is highly durable with high strength and reduced fuel gas cross-leakage. This porous membrane can be used as a solid polymer electrolyte membrane to obtain a fuel cell with improved output voltage and current density.

Description

technical field [0001] The present invention relates to a variety of functional membranes, particularly inorganic or organic porous membranes most suitable for solid polymer electrolytes used in solid polymer fuel cells, water electrolysis devices, etc., and to methods for their manufacture and fuel cells comprising the porous membranes . In particular, the present invention relates to porous membranes made of polymeric or inorganic membranes or sheets having through-pores with a pore size of 100 micrometers or less, preferably 10 micrometers or less, which can be easily designed according to physical properties, and methods of manufacture thereof. The present invention also relates to a solid polymer electrolyte membrane exhibiting excellent durability when used in a fuel cell without breakage due to repeated changes in operating conditions, and a method for producing the same. Background technique [0002] A solid polymer electrolyte fuel cell has a structure including a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/00H01B13/00B23K26/00H01M8/02C08J9/36H01M8/10H01B1/06C08J5/22
CPCB01D67/0006B01D69/02B01D69/105B01D71/36B01D71/70B01D2323/30B01D2323/345C08J5/2287H01B1/122H01M2300/0091C08J2327/18B23K26/382B23K26/0624B23K26/40H01M8/0289B23K2103/42B23K2103/50Y10T29/49115Y10T29/49108Y02E60/50B01D71/5222B01D2325/0283B01D69/106
Inventor 片山幸久
Owner TOYOTA JIDOSHA KK
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com