6533b829fe1ef96bd1289af6

RESEARCH PRODUCT

Triblock SEBS/DVB crosslinked and sulfonated membranes: Fuel cell performance and conductivity

Carmem T. PrimazR. Teruel-juanesAmparo Ribes-greusCarmen Del RíoOscar Gil-castell

subject

Solucions polimèriquesMaterials scienceCrosslinkingMembranesPolymers and PlasticsCopolymers09.- Desarrollar infraestructuras resilientes promover la industrialización inclusiva y sostenible y fomentar la innovaciónGeneral ChemistryConductivityPolyelectrolytesPolyelectrolyteSurfaces Coatings and Films08.- Fomentar el crecimiento económico sostenido inclusivo y sostenible el empleo pleno y productivo y el trabajo decente para todos07.- Asegurar el acceso a energías asequibles fiables sostenibles y modernas para todosMembraneChemical engineeringMAQUINAS Y MOTORES TERMICOSDigital Video BroadcastingMaterials ChemistryCopolymerFuel cellsFuel cellsMaterials

description

[EN] A set of styrene-ethylene-butylene-styrene triblock copolymer (SEBS) membranes with 10 or 25 wt.% divinyl-benzene (DVB) as a crosslinking agent were prepared and validated. Physicochemical characterization revealed suitable hydrolytic and thermal stability of photo-crosslinked membranes containing 25%wt. DVB and post-sulfonated. These compositions were evaluated in H2/O2 single cells, and electrical and proton conductivities were furtherly assessed. The membranes with the milder post-sulfonation showed greater proton conductivity than those with excessive sulfonation. In terms of electrical conductivity, a universal power law was applied, and the values obtained were low enough for being used as polyelectrolytes. At the analyzed temperatures, the charge transport process follows a long-range pathway or vehicular model. Finally, fuel cell performance revealed the best behavior for the membrane with 25 wt.% DVB, photo-crosslinked during 30 min and mild sulfonated, with a promising power density of 526 mW·cm-2. Overall, the results obtained highlight the promising fuel cell performance of these cost-effective triblock copolymer-based membranes and indicate that higher sulfonation does not necessarily imply better power density.

yearjournalcountryeditionlanguage
2021-01-01
10.1002/app.50671http://hdl.handle.net/10261/252571