Nanofiber network ion-exchange membranes for PEM fuel cells

Jonghyun Choi, Kyung Min Lee, Ryszard Wycisk, Peter N. Pintauro, Patrick T. Mather

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An entirely new approach for fabricating proton conducting fuel cell membranes, based on the forced assembly of ionomeric and uncharged polymers, has been developed. An electrospun mat of proton-conducting polymeric nanofibers is created and then intersecting fibers are welded to produce a three-dimensional nanofiber network. An inert/impermeable (uncharged) polymer is impregnated into the void space between the fibers to provide mechanical strength, gas barrier properties, and controlled water swelling. Thus, the role of the mechanical support polymer is decoupled from that of the proton conducting material. In the present study, the nanofiber network (occupying about 70% of the dry membrane volume) was composed of sulfonated poly(arylene ether sulfone) with an ion-exchange capacity of 2.1-2.6 mmol/g. To further enhance proton conductivity, the nanofibers were electrospun from a polymer solution containing 35 or 40 wt% sulfonated polyhedral oligomeric silsesquioxane. Norland Optical Adhesive (NOA) 63, a UV-curable pre-polymer, was embedded into the sulfonated polysulfone mat. The resulting films were gas impermeable, with a proton conductivity greater than that for DuPont's Nafion at temperatures ranging from 30 to 120°C and relative humidities of 60-95%.

Original languageEnglish (US)
Title of host publicationAmerican Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
StatePublished - Dec 1 2009
Event237th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Salt Lake City, UT, United States
Duration: Mar 22 2009Mar 26 2009

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Other

Other237th National Meeting and Exposition of the American Chemical Society, ACS 2009
CountryUnited States
CitySalt Lake City, UT
Period3/22/093/26/09

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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  • Cite this

    Choi, J., Lee, K. M., Wycisk, R., Pintauro, P. N., & Mather, P. T. (2009). Nanofiber network ion-exchange membranes for PEM fuel cells. In American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers (ACS National Meeting Book of Abstracts).