Fig. 2: Gas and water sorption and transport behavior.
From: Poly(fluorenyl aryl piperidinium) membranes and ionomers for anion exchange membrane fuel cells
a Schematic diagram of the membrane electrode assembly (MEA) in AEMFCs emphasizing fuel gas and water transport. b The WU of PFBP-0, PFBP-14, PFTP-0, and PFTP-13 membranes in OH− form in liquid water. c Dynamic water vapor sorption behavior of PFBP-0, PFBP-14, PFTP-0, and PFTP-13 membranes at different RHs measured in a DVS instrument (RH changes between 18%, 36%, 54%, 72%, 90% at a time interval of 60 min) at 25 °C. RH is controlled to automatically increase in a DVS instrument at a given time interval. Two hydration–dehydration cycles were recorded. d Water vapor permeability, and e H2 permeability of different AEPs in I− form at 60 °C under 2.2 bar unilateral backpressure. H2 permeability of reported PAP-TP-x17 is presented for comparison.
