Abstract
Using the synthesized tetra-aryl-polyphosphonium polymer (pTAP) with polysulfone (PS), novel anion exchange composite membranes with controlled thicknesses were developed using simple solution casting method. The composite membranes were characterized by FTIR, XRD, water uptake, ionic conductivity and alkaline stability to ensure the suitability of their use as an electrolyte in alkaline electrochemical systems. Also, the thermal and mechanical stability of the composite membranes was analyzed. The threshold weight percentage of pTAP loading on PS is limited to 60% due to agglomeration and would have an adverse effect on the mechanical properties of PS/pTAP membrane due to the excess of pTAP. Among the composite membranes developed here, the membrane had a maximum ionic conductivity of 4.2 mS/cm at 40 °C with 60% pTAP at 40% PS. With no major weight loss, the composite membranes have maximum thermal stability of up to 150 °C.
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Acknowledgements
This work was made possible by the support of the Qatar Environment and Energy Research Institute, QEERI, and the National Research Fund (QNRF), through the project #NPRP-10-0126-170254.
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Arunachalam, M. et al. (2022). Investigation of Novel Anion Exchange Membranes Based on Poly-Tetra-Aryl-Phosphonium Ionomer for Electrochemical Energy Conversion and Storage Applications. In: Heggy, E., Bermudez, V., Vermeersch, M. (eds) Sustainable Energy-Water-Environment Nexus in Deserts. Advances in Science, Technology & Innovation. Springer, Cham. https://doi.org/10.1007/978-3-030-76081-6_58
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