Ionic Liquid Composite Polybenzimidazol Membranes for High Temperature PEMFC Applications

[EN] A series of proton exchange membranes based on polybenzimidazole (PBI) were prepared using the low cost ionic liquids (ILs) derived from 1-butyl-3-methylimidazolium (BMIM) bearing different anions as conductive fillers in the polymeric matrix with the aim of enhancing the proton conductivity of...

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Detalles Bibliográficos
Autores: Escorihuela, Jorge, Garcia-Bernabe, Abel|||0000-0002-9740-0830, Montero Reguera, Álvaro Enrique|||0000-0002-4165-4743, Sahuquillo, Oscar|||0000-0001-5360-3743, Giménez Torres, Enrique|||0000-0002-6330-0209, Compañ Moreno, Vicente|||0000-0001-8233-7472
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/201624
Acceso en línea:https://riunet.upv.es/handle/10251/201624
Access Level:acceso abierto
Palabra clave:Fuel cells
Materials science
Proton exchange membrane
Polymer
Polybenzimidazole
Ionic liquid
Proton conductivity
Electrochemical impedance spectroscopy
MAQUINAS Y MOTORES TERMICOS
CIENCIA DE LOS MATERIALES E INGENIERIA METALURGICA
Descripción
Sumario:[EN] A series of proton exchange membranes based on polybenzimidazole (PBI) were prepared using the low cost ionic liquids (ILs) derived from 1-butyl-3-methylimidazolium (BMIM) bearing different anions as conductive fillers in the polymeric matrix with the aim of enhancing the proton conductivity of PBI membranes. The composite membranes prepared by casting method (containing 5 wt. % of IL) exhibited good thermal, dimensional, mechanical, and oxidative stability for fuel cell applications. The effects of anion, temperature on the proton conductivity of phosphoric acid-doped membranes were systematically investigated by electrochemical impedance spectroscopy. The PBI composite membranes containing 1-butyl-3-methylimidazolium-derived ionic liquids exhibited high proton conductivity of 0.098 Scm(-1) at 120 degrees C when tetrafluoroborate anion was present in the polymeric matrix. This conductivity enhancement might be attributed to the formed hydrogen-bond networks between the IL molecules and the phosphoric acid molecules distributed along the polymeric matrix.

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