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Proton conductivity improvement of polymer electrolyte membrane using nano-scale explosion of water in the membrane

Title
Proton conductivity improvement of polymer electrolyte membrane using nano-scale explosion of water in the membrane
Authors
Kim S.H.Mehmood A.Ahn Y.Kim H.-S.Ha H.Y.Kim D.Han O.H.
Ewha Authors
한옥희
SCOPUS Author ID
한옥희scopus
Issue Date
2016
Journal Title
Journal of Electroanalytical Chemistry
ISSN
1572-6657JCR Link
Citation
vol. 782, pp. 32 - 35
Keywords
Fuel cellsHot-pressingIon cluster network morphologyNafionPolymer electrolyte membraneProton conductivityWater
Publisher
Elsevier B.V.
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Proton conductivity of polymer electrolyte membrane (PEM) is greatly governed by the amount and distribution of water as well as morphology and alignment of hydrophilic channels forming the ion cluster network in the PEM. However, The water in PEM during hot-pressing above the glass-transition temperature of PEM and the boiling point of water has not been expected to influence the proton conductivity. Here we show that higher water amount of PEMs during the hot-pressing process results in better fuel cell performance due to shortcut-proton-pathways generated by the sudden water explosion on the nano-scale. Our results demonstrate a new post-PEM-processing method to enhance proton conductivity without additional tool/procedure, and provide some clues to the behavior of liquid molecules embedded on the nano-scale in polymers. This may open a new door to nano-scale explosion of water and/or other small liquid molecules for morphological change of pores/channels in polymer. © 2016 Elsevier B.V.
DOI
10.1016/j.jelechem.2016.10.003
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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