Skorikova, Galina S.Rauber, DanielAili, DavidMartín Fernández, SantiagoLi, QingfengHenkensmeier, DirkHempelmann, Rolf2024-11-122024-11-122020G. Skorikova, D. Rauber, D. Aili, S. Martin, Q. Li, D. Henkensmeier, R. Hempelmann, Protic ionic liquids immobilized in phosphoric acid-doped polybenzimidazole matrix enable polymer electrolyte fuel cell operation at 200 °C, Journal of Membrane Science, Volume 608, 2020, 118188, ISSN 0376-7388, https://doi.org/10.1016/j.memsci.2020.1181880376-7388 | eISSN 1873-3123https://doi.org/10.1016/j.memsci.2020.118188https://hdl.handle.net/20.500.14468/24354The registered version of this article, first published in “Journal of Membrane Science, vol 44", is available online at the publisher's website: Elsevier, https://doi.org/10.1016/j.memsci.2020.118188 La versión registrada de este artículo, publicado por primera vez en “Journal of Membrane Science, vol 44", está disponible en línea en el sitio web del editor: Elsevier, https://doi.org/10.1016/j.memsci.2020.118188Protic ionic liquids (PILs) based on the anion bis(trifluoromethanesulfonyl)imide were confined in polybenzimidazole (PBI) matrices. Quasi-solidified ionic liquid membranes (QSILMs) were fabricated and examined for mechanical and thermal stability. After doping in phosphoric acid (PA), the QSILMs exhibited conductivities of 30–60 mS cm−1 at 180 °C. Fluorescence microscopy was used to investigate the structure of the composite PBI membranes. Membrane-electrode assemblies, fabricated with PA doped QSILMs, were tested in a single fuel cell and exhibited a performance increase with increasing temperature up to 200 °C. The best performance was obtained for the membrane electrode assembly containing 50 mol% of diethyl-methyl-ammonium bis(trifluoromethylsulfonyl)imide confined in the phosphoric acid doped PBI matrix with closed porosity. It reached 0.32 W cm−2 at 200 °C and 900 mA cm−2 . The catalyst layer of the gas diffusion electrode impregnated with protic ionic liquid exhibited better long-term stability than the gas diffusion electrode impregnated with phosphoric acid within 100 h of operation at 200 °C and anhydrous conditions.eninfo:eu-repo/semantics/openAccess12 Matemáticas::1299 Otras especialidades matemáticasartículoPolybenzimidazoleProtic ionic liquidHigh temperature fuel cellsImmobilizationPolymer composite membrane