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Post-assembly modification of polymeric composite membranes using spin drying for fuel cell applications

Authors
Lee, Kyung AhYoon, Ki RoKwon, Sung HyunLee, Kyung JinJo, SunheeLee, Ju SungLee, Kwan-YoungLee, Seung WooLee, Seung GeolKim, Jin Young
Issue Date
7-4월-2019
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.7, no.13, pp.7380 - 7388
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF MATERIALS CHEMISTRY A
Volume
7
Number
13
Start Page
7380
End Page
7388
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/66042
DOI
10.1039/c8ta10538c
ISSN
2050-7488
Abstract
Self-assembly of inter-and intraphases between the ionomer membrane and mechanical reinforcements in reinforced polymeric composite membranes is of great interest in both physics and chemistry, particularly for proton exchange membrane fuel cell (PEMFC) application. One of the greatest challenges is to obtain an optimally structured polytetrafluoroethylene (PTFE)-reinforced perfluorosulfonic acid (PFSA) composite membrane via solution processing. For high-performance and durable PEMFC applications, the selfassembly of interphases of the ionomers/reinforcements and intraphases of the ionomers in the composite PEM needs to be carefully tailored. Here, we show that post-assembly modification of a PTFE/ PFSA composite membrane using a spin-drying method can significantly improve fuel cell performance and reliability. The forced assembly of PFSA ionomers during spinning results in greater infiltration yields into the porous PTFE media. In this way, spin-drying post-treatment results in lower gas crossover and improved mechanical durability. This process also yields larger regions of ionic clusters, which facilitate proton conduction at low relative humidity, affording higher fuel cell currents and greater efficiency.
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Lee, Kwan Young
공과대학 (화공생명공학과)
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