Membrane/Electrode Interface Design for Effective Water Management in Alkaline Membrane Fuel Cells

Title
Membrane/Electrode Interface Design for Effective Water Management in Alkaline Membrane Fuel Cells
Authors
김형준유성종장주혁채지언장세근허민김성준최지우최만수김상문조용훈성영은
Issue Date
2019-09
Publisher
ACS Applied Materials & Interfaces
Citation
VOL 11, NO 38-34811
Abstract
The recent development of ultrathin anion exchange membranes and optimization of their operating conditions have significantly enhanced the performance of alkaline-membrane fuel cells (AMFCs); however, the effects of the membrane/electrode interface structure on the AMFC performance have not been seriously investigated thus far. Herein, we report on a high-performance AMFC system with a membrane/electrode interface of novel design. Commercially available membranes are modified in the form of well-aligned line arrays of both the anode and cathode sides by means of a solvent-assisted molding technique and sandwich-like assembly of the membrane and polydimethylsiloxane molds. Upon incorporating the patterned membranes into a single-cell system, we observe a significantly enhanced performance of up to ∼35% compared with that of the reference membrane. The enlarged interface area and reduced membrane thickness from the line-patterned membrane/electrode interface result in improved water management, reduced ohmic resistance, and effective utilization of the catalyst. We believe that our findings can significantly contribute further advancements in AMFCs.
URI
http://pubs.kist.re.kr/handle/201004/70264
ISSN
1944-8244
Appears in Collections:
KIST Publication > Article
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