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Title: Micromold methods for fabricating perforated substrates and for preparing solid polymer electrolyte composite membranes

In polymer electrolyte membrane (PEM) fuel cells and electrolyzes, attaining and maintaining high membrane conductivity and durability is crucial for performance and efficiency. The use of low equivalent weight (EW) perfluorinated ionomers is one of the few options available to improve membrane conductivity. However, excessive dimensional changes of low EW ionomers upon application of wet/dry or freeze/thaw cycles yield catastrophic losses in membrane integrity. Incorporation of ionomers within porous, dimensionally-stable perforated polymer electrolyte membrane substrates provides improved PEM performance and longevity. The present invention provides novel methods using micromolds to fabricate the perforated polymer electrolyte membrane substrates. These novel methods using micromolds create uniform and well-defined pore structures. In addition, these novel methods using micromolds described herein may be used in batch or continuous processing.
Inventors:
; ; ;
Issue Date:
OSTI Identifier:
1374428
Assignee:
GINER, INC. DOEEE
Patent Number(s):
9,728,802
Application Number:
14/120,353
Contract Number:
EE0004533
Resource Relation:
Patent File Date: 2014 May 14
Research Org:
GINER, INC. Newton, MA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Works referenced in this record:

Modified imprinting process using hollow microneedle array for forming through holes in polymers
journal, August 2011
  • Shibata, Takayuki; Yukizono, Satoshi; Kawashima, Takahiro
  • Microelectronic Engineering, Vol. 88, Issue 8, p. 2121-2125
  • DOI: 10.1016/j.mee.2010.12.048

Polymer through-hole membrane fabricated by nanoimprinting using metal molds with high aspect ratios
journal, January 2007
  • Yanagishita, Takashi; Nishio, Kazuyuki; Masuda, Hideki
  • Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, Vol. 25, Issue 4, Article No. L35
  • DOI: 10.1116/1.2753847

Perforated polymer membranes fabricated by nanoimprint
journal, April 2006
  • Schift, Helmut; Bellini, Sandro; Gobrecht, Jens
  • Microelectronic Engineering, Vol. 83, Issue 4-9, p. 873-875
  • DOI: 10.1016/j.mee.2005.12.027