Woo, Sahng Hyuck Lee, So Young Yoon, Young-Gi Rigacci, Arnaud Woo, Jung-Je Beauger, Christian Kim, Hyoung Juhn 2024-01-19T11:00:32Z 2024-01-19T11:00:32Z 2022-10-27 2022-11 0378-7753 https://pubs.kist.re.kr/handle/201004/114414 The proton exchange membrane (PEM) is pivotal among the various components of proton exchange membrane fuel cells (PEMFCs). From the many PEMs, perfluorosulfonic acid and non-fluorinated hydrocarbon electrolyte membranes are used in PEMFC operation, but they have a limited performance above 90 degrees C and at a relative humidity (RH) below 50%. Hence, the incorporation of nanoclay, an inorganic filler, into polymer matrixes has been attempted to improve the performance of PEMs. Nanoclays, such as montmorillonite and laponite in a layered silicate morphology, sepiolite nanofibers and halloysite nanotubes, with their fiber morphologies, and layered double hydroxide are attractive for composite membranes because they improve the hydrophilicity, hygroscopicity, and thermal stability of composite membranes at intermediate temperatures and low RH. The introduction of nanoclays also improves the mechanical properties. Furthermore, nanoclays are cost-competitive among the nanomaterials, thereby offering the potential to reduce composite membranes costs. This review highlights the preparation of composite membranes containing sulfonic, perfluorosulfonic, and amine groups, and other types of functionalized nanoclays, as well as the characterization of the composite membranes and cell performances operating at low RH. English Elsevier BV Functionalized nanoclays for improved properties of composite proton exchange membranes Article 10.1016/j.jpowsour.2022.232083 1 Journal of Power Sources, v.549 Journal of Power Sources 549 N scie scopus 000867481600005 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Review POLY(ETHER ETHER KETONE) PERFLUORINATED SULFONIC-ACID NANOCOMPOSITE MEMBRANES FUEL-CELLS ELECTROLYTE MEMBRANES HALLOYSITE NANOTUBES MONTMORILLONITE NANOCOMPOSITE MECHANICAL-PROPERTIES PHOSPHOTUNGSTIC ACID BARRIER PROPERTIES Polymer Nanoclay Composite membrane Proton exchange membrane fuel cell (PEMFC)