Achieving better balance on the mechanical stability and conduction performance of sulfonated poly(ether ether ketone) proton exchange membranes through polydopamine/polyethyleneimine co-modified poly(vinylidene fluoride) nanofiber as support

Nanofiber applications in microbial fuel cells for enhanced energy generation: a mini review

“…Similarly, PVDF nanofibers were used as a proton exchange membrane after being functionalized with polydopamine/polyethyleneimine (PDA/PEI) and filled with sulfonated poly (ether ether ketone) (SPEEK) (SPEEK-PDA/PEI@PVDF). 119 Undoubtedly, the membrane exhibited exceptional mechanical properties, particularly in wet conditions. Additionally, the SPEEK-PDA/PEI@PVDF composite membrane demonstrated excellent long-term stability and durability.…”

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

“…Tan et al 124 introduced hydrophilic flexible side chains into the PFC-TF-SI membrane, promoting increased chain entanglement and resulting in better thermal stability than the original membrane material PFC. Chu et al 125 incorporated PDA/PEI-modified PVDF nanofibers into an SPEEK base membrane to create an SPEEK–PDA/PEI@PVDF composite membrane that exhibited better thermal stability than pure PVDF and SPEEK membrane (Fig. 14c).…”

“…Additionally, the cross-linking network structure and hydrogen bond network effectively restrained methanol diffusion. Chu et al 125 introduced PDA/PEI modified PVDF nanofibers into an SPEEK base membrane, resulting in the SPEEK–PDA/PEI@PVDF composite membrane showcasing notable methanol barrier capabilities (Fig. 16b).…”

“…The length of the hydrophilic oligomers in the side chain and the synergistic effect of the difunctional groups significantly reduced proton conduction resistance, providing a new research idea and experimental basis for the development of NPFSA-PEM suitable for a wide humidity range. Chu et al 125 assembled the SPEEK–PDA/PEI@PVDF composite membrane into a methanol fuel cell and achieved a peak power density of 58.9 mW cm −2 at 2 M methanol fuel concentration and 80 °C. The membrane maintained an initial open-circuit voltage of 97.39% and a peak power density of 54.3 mW cm −2 after 100 hours of continuous operation under these conditions.…”