Advanced proton exchange membrane prepared from N-heterocyclic poly(aryl ether ketone)s with pendant benzenesulfonic moieties and performing enhanced radical tolerance and fuel cell properties

Robust Proton-Exchange Membranes Based on Perfluorosulfonic Acid-Functionalized Poly(phenyl-alkane) and Polyxanthene: Effects of Skeletal Structures on Membrane Properties

“…The applicability of PA-BP-PFSA and PX-BP-PFSA in electrochemical devices was evaluated by assembling single fuel cells using PA-BP-PFSA and PX-BP-PFSA as the PEMs and Pt/C as the catalyst (Figure ). The OCVs of the fuel cells with PA-BP-PFSA and PX-BP-PFSA were 0.81 and 0.85 V, respectively, which were slightly lower than the reported values using the Nafion membrane (∼0.95 V) or sulfonated poly­(phthalazinone ether ketone) membrane (∼0.96 V) . The relatively lower OCVs of PA-BP-PFSA- and PX-BP-PFSA -based fuel cells could be explained on the basis of their higher H 2 and O 2 crossover and lower proton conductivities as compared to that of Nafion.…”

“…The OCVs of the fuel cells with PA-BP-PFSA and PX-BP-PFSA were 0.81 and 0.85 V, respectively, which were slightly lower than the reported values using the Nafion membrane (∼0.95 V) or sulfonated poly(phthalazinone ether ketone) membrane (∼0.96 V). 36 The relatively lower OCVs of PA-BP-PFSA-and PX-BP-PFSA-based fuel cells could be explained on the basis of their higher H 2 and O 2 crossover and lower proton conductivities as compared to that of Nafion. The higher OCV of the PX-BP-PFSA-based fuel cell over PA-BP-PFSA-based one could be explained by the higher proton conductivity of PX-BP-PFSA relative to that of PA-BP-PFSA, which overrode the effect of H 2 /O 2 permeability.…”

Recent advances in non-perfluorinated sulfonic acid proton exchange membranes in the energy field

“…In contrast, the SPBPEK-Ps membrane, developed by Liu et al 106 exhibited superior antioxidant properties compared to traditional SPAEs membranes. This improvement is attributed to the reinforced molecular chain stemming from weaker connecting units (ether bonds and carbonyl groups in the double halide unit).…”

“…It also opens up new possibilities for developing other specific membrane types. The SPBPEK-Ps membrane developed by Liu et al 106 demonstrated the highest power density of 1210 mW cm −2 (80 °C, 100% RH) in fuel cells (Fig. 17i).…”

“…The improved proton conductivity was attributed to the introduction of sulfonic acid groups on the surface of the nanotubes, as well as the similarity of chemical structures and hydrogen bonds on the nanotube surfaces, leading to enhanced phase separation and a larger hydrophilic domain. Liu et al 106 prepared an N-heterocyclic polyaryl ether (SPBPEK-Ps) membrane containing a sulfonated side phenyl group. The multi-level interaction between the sulfonic acid group and the heterocyclic structure in the SPBPEK-Ps membrane, coupled with the tunable microphase structure derived from the side proton-conductive group regulated by the copolymer composition, enhanced the proton conductivity to 125.0 mS cm −1 .…”