Membrane/Electrode Interface Design for Effective Water Management in Alkaline Membrane Fuel Cells
- Membrane/Electrode Interface Design for Effective Water Management in Alkaline Membrane Fuel Cells
- 김형준; 유성종; 장주혁; 채지언; 장세근; 허민; 김성준; 최지우; 최만수; 김상문; 조용훈; 성영은
- Issue Date
- ACS Applied Materials & Interfaces
- VOL 11, NO 38-34811
- 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.
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