Reinforced Polymer Blend Membranes with Liposome-Like Morphology for Polymer Electrolyte Membrane Fuel Cells Operating under Low-Humidity Conditions

Title
Reinforced Polymer Blend Membranes with Liposome-Like Morphology for Polymer Electrolyte Membrane Fuel Cells Operating under Low-Humidity Conditions
Authors
김형준장종현유성종김진영이소영채지언박치훈이승주이혜진
Keywords
PEMFC; electrolyte membrane
Issue Date
2021-01
Publisher
Advanced engineering materials
Citation
VOL 게재예정-2001174
Abstract
Reinforced polymer blend membranes with liposome­like morphology prepared for applications in polymer electrolyte membrane fuel cells from a sulfonated poly(ether sulfone) (BPSH), a hydroxylated poly(ether sulfone), and a hydroxylated sulfonated poly(ether sulfone) as a compatibilizer are characterized both experimentally and theoretically (by mesoscale and molecular dynamics simulations). Compared with those prepared from pristine BPSH, blend membranes exhibit improved mechanical strength, lower water uptake, and better dimensional stability, which is ascribed to the presence of hydroxylated polymers and the resulting hydrogen bonding between polymer chains. The blend membranes also show unusual morphologies; e.g., the 60­811 membrane exhibits a unique nanoscale phase­separated morphology similar to that of a liposome, featuring hydrophilic spherical ionic clusters (0.5?μm) with the small ionic domains of 15?20?nm at their cores. Hydrogen bonding between hydroxyl groups and sulfonic acid groups in this membrane results in enhanced water retention capability, high proton conductivity, and excellent single­cell performance superior to that of Nafion 212 under the conditions of both full and insufficient hydration.
URI
http://pubs.kist.re.kr/handle/201004/72775
ISSN
1438-1656
Appears in Collections:
KIST Publication > Article
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