Abstract
In this study, graphene (G) was blended with sulfonated polyether sulfone octyl sulfonamide (SPESOS) in different ratios (1, 1.5, and 2 wt.%) to enhance the proton conductivity of SPESOS. The results of the water absorption analysis and current impedance spectroscopy of a G/SPESOS hybrid film showed that the proton conductivity improved due to the hydrophilic-hydrophobic nature of the hybrid. Further analysis showed that the synthesized hybrid film had a desirable contact angle and good ion exchange capacity, water absorption, and thermal stability. The hybrid film with 2 wt.% graphene showed better proton conductivity (92 mS/cm) than the pristine SPESOS film (34 mS/cm) at 100% relative humidity. These results suggested that the synthesized hybrid films offered superior proton conductivity, ion exchange capacity, and hydrophilicity compared to pristine SPESOS.
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Acknowledgements
The authors would like to thank Research and Technology Center of Energy, Technopark Borj Cedria for their support. The authors extend their appreciation to the manager of Eras Labo for providing the SPESOS polymer free of charge.
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Highlights
• An organic-inorganic hybrid film having potential applications in fuel cells was prepared and characterized.
• Graphene improved the contact angle, water uptake, and other physicochemical properties of hybrid films.
• Hybrid film 2% G/SPESOS exhibited proton conductivity augmentation at elevated temperatures and humidity.
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Mabrouk, W., Jebri, S., Charradi, K. et al. Fabrication and characterization of graphene/sulfonated polyether sulfone octyl sulfonamide hybrid film with improved proton conductivity performance. J Solid State Electrochem 27, 991–999 (2023). https://doi.org/10.1007/s10008-023-05411-2
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DOI: https://doi.org/10.1007/s10008-023-05411-2