Korea-Taiwan Joint Symposium: Recent Advances in Polymer Science and Engineering: From Fundamentals to Applications (English)
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Nanocomposite Membranes Comprising Polybenzimidazole and Porous Crystalline Materials with Improved Ionic Conductivity for Fuel Cells
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Porous crystalline materials such as metal-organic frameworks (MOFs) and covalent organic frameworks (COFs) have recently emerged as promising nanofillers for ion-conducting electrolyte membranes due to their highly ordered crystalline nanochannels, large surface area, high thermal stability, and tunable functionality. In addition, MOF- and COF-based nanofillers have demonstrated significant effectiveness in simultaneously enhancing the properties of polymer electrolyte membranes, including ionic conductivity, dimensional stability, mechanical strength, and oxidative stability. Recently, we fabricated phosphoric acid-doped polybenzimidazole nanocomposite membranes containing MOF-based nanofillers (UiO-66 and MOF-303) for high-temperature proton exchange membrane fuel cells, as well as quaternized polybenzimidazole nanocomposite membranes containing COF-based nanofillers (COF-LZU1) for anion exchange membrane fuel cells. All of these nanocomposite membranes showed significantly improved ionic conductivity. The results of morphological analysis, membrane properties, and fuel cell performance will also be discussed in this presentation.