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Quaternized Polyethersulfone (QPES) Membrane with Imidazole Functionalized Graphene Oxide (ImGO) for Alkaline Anion Exchange Fuel Cell Application

Author

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  • Moshito Lethabo Mothupi

    (Department of Chemical Science, University of Johannesburg, Johannesburg 2028, South Africa
    Research Centre for Synthesis and Catalysis, University of Johannesburg, Johannesburg 2028, South Africa)

  • Phumlani Fortune Msomi

    (Department of Chemical Science, University of Johannesburg, Johannesburg 2028, South Africa
    Research Centre for Synthesis and Catalysis, University of Johannesburg, Johannesburg 2028, South Africa)

Abstract

Membranes made up of composite materials have shown promising advantages for application in alkaline fuel cell anion exchange membranes. In this study, a general method is employed to improve the overall performance and properties of alkaline anion exchange membranes by making use of polyethersulfone quaternized with imidazolium groups and blended with imidazolium functionalized graphene oxide inorganic filler (ImGO). The inorganic filler blended with the polymer matrix yielded better ionic transport, with 73.2 mS·cm −1 being the highest ion conductivity for the polymer membrane with 0.5% ImGO content, which is higher than that of the QPES parent material. The 0.5% ImGO content also showed better swelling ratio, water uptake, alkaline stability, ion exchange capacity and alkaline stability in comparison to other membranes. Furthermore, it also exhibited 130 mW·cm −2 peak power.

Suggested Citation

  • Moshito Lethabo Mothupi & Phumlani Fortune Msomi, 2023. "Quaternized Polyethersulfone (QPES) Membrane with Imidazole Functionalized Graphene Oxide (ImGO) for Alkaline Anion Exchange Fuel Cell Application," Sustainability, MDPI, vol. 15(3), pages 1-18, January.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:3:p:2209-:d:1046124
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    References listed on IDEAS

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    1. Zhihao Shang & Ryszard Wycisk & Peter Pintauro, 2021. "Electrospun Composite Proton-Exchange and Anion-Exchange Membranes for Fuel Cells," Energies, MDPI, vol. 14(20), pages 1-21, October.
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    3. Ho Jun Yoo & Gu Young Cho, 2022. "Effects of Humidification with NaCl Solution Mist on Electrochemical Characteristics of Polymer Electrolyte Membrane Fuel Cells," Sustainability, MDPI, vol. 14(23), pages 1-9, December.
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