BROWSE

Related Researcher

Author

Lee, Sang-Young
Energy Soft-Materials Lab (ESML)
Research Interests
  • Soft Materials for Energy Storage/ Conversion Systems

ITEM VIEW & DOWNLOAD

Polyimide nonwoven fabric-reinforced, flexible phosphosilicate glass composite membranes for high-temperature/low-humidity proton exchange membrane fuel cells

Cited 7 times inthomson ciCited 4 times inthomson ci
Title
Polyimide nonwoven fabric-reinforced, flexible phosphosilicate glass composite membranes for high-temperature/low-humidity proton exchange membrane fuel cells
Author
Lim, Jun-MukWon, Ji-HyeLee, Hyeon-JiHong, Young TaikLee, Moo-SeokKo, Chang HyunLee, Sang-Young
Keywords
Facile formation; Grotthuss mechanism; High temperature; Hydrothermal treatments; In-situ; Non-woven; Non-woven substrates; Phosphosilicate glass; Polymer electrolyte membranes; Porous structures; Potential applications; Proton transport; Reinforced composites; Sol-gel synthesis; Sulfonated poly(arylene ether sulfone); Trimethoxysilane
Issue Date
2012
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY, v.22, no.35, pp.18550 - 18557
Abstract
We demonstrate polyimide (PI) nonwoven fabric-reinforced, flexible proton-conductive phosphosilicate glass composite membranes for potential application in high-temperature/low-humidity proton exchange membrane fuel cells (PEMFCs). The new reinforced composite membrane is fabricated via the impregnation of a 3-glycidyloxypropyl trimethoxysilane (GPTMS)/orthophosphoric acid (H 3PO 4) mixture into a PI nonwoven substrate followed by in situ sol-gel synthesis and hydrothermal treatment. This unique structural integrity enables the reinforced composite membrane to provide unprecedented improvement in the mechanical properties (notably flexibility and thickness) over typical bulk phosphosilicate glasses that are highly fragile and thick. Meanwhile, the highly porous structure of the PI reinforcing framework allows for the facile formation of a three-dimensionally interconnected phosphosilicate glass matrix in the reinforced composite membrane, which in turn offers favorable pathways for proton transport. Another advantageous feature of the reinforced composite membrane is higher proton conductivity under dehumidified conditions, as compared to a hydration-dependent polymer electrolyte membrane such as sulfonated poly(arylene ether sulfone) (SPAES). This superior proton conductivity of the reinforced composite membrane is further discussed with in-depth consideration of its architectural novelty and proton transport phenomena governed by the Grotthuss mechanism.
URI
Go to Link
DOI
http://dx.doi.org/10.1039/c2jm33406b
ISSN
0959-9428
Appears in Collections:
ECHE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU