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dc.contributor.authorBenítez de la Torre, A.
dc.contributor.authorLuna-Lama, Fernando
dc.contributor.authorCaballero, Álvaro
dc.contributor.authorRodríguez-Castellón, Enrique
dc.contributor.authorMorales, Julián
dc.date.accessioned2022-03-11T12:14:59Z
dc.date.available2022-03-11T12:14:59Z
dc.date.issued2021
dc.identifier.urihttp://hdl.handle.net/10396/22683
dc.description.abstractLithium–sulfur batteries have been recognised as highly promising next-generation batteries, due to their low cost and high theoretical energy density. Despite numerous advances in this technology over the last decade, its commercialisation is still a challenge that has not yet been achieved. Many efforts have been made to improve the problems that these batteries present, mainly by investigating different cathode manufacturing strategies, testing novel Li anodes, new additives in the electrolytes, and modified separators or interlayers. However, the characteristics of the current collectors used in the preparation of the electrodes have been rarely addressed. Three commercial collectors are commonly used in basic research on Li–S batteries: Al foil, carbon coated Al foil (Al-C), and carbon paper (gas diffusion layer, GDL). In this work, a detailed study of the electrochemical response of these commercial collectors has been carried out. The tests were carried out on two S composites formed by carbons of a different natures, commercial carbon black and synthetic N-doped graphene. In addition, the S impregnation method was different, using either melt diffusion at 155 °C or ethylenediamine as S solvent, respectively. In both systems, the results were similar – the electrodes supported on GDL delivered higher specific capacities than those supported on Al and Al-C, with minimal differences between the two. Of the different collector properties examined to explain this behaviour, namely Al corrosion, electrical conductivities, surface-level composition, and surface texture, only the latter had a significant effect in the performance of GDL-based electrodes. SEM images revealed a rough and cracked surface formed by the agglomerated carbon particles that give rise to a complex pore system, predominantly consisting of macropores. All of these features are beneficial for a better anchoring of the active material on the collector surface, in addition to enhancing the wettability of the electrolyte and favouring reaction kinetics. In contrast, the Al-based collector possesses a very smooth and non-porous surface, detrimental to both the active material-substrate interface and the active material impregnation by the electrolyte.es_ES
dc.format.mimetypeapplication/pdfes_ES
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.rightshttps://creativecommons.org/licenses/by-nc-nd/4.0/es_ES
dc.sourceJournal of Energy Chemistry 62, 295-306 (2021)es_ES
dc.subjectCurrent collectores_ES
dc.subjectCarbon paperes_ES
dc.subjectAluminum foiles_ES
dc.subjectLithium–sulfur batteryes_ES
dc.titleContribution to the understanding of the performance differences between commercial current collectors in Li–S batterieses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.relation.publisherversionhttps://doi.org/10.1016/j.jechem.2021.03.014es_ES
dc.relation.projectIDGobierno de España. MAT2017-87541-Res_ES
dc.relation.projectIDJunta de Andalucía. FQM-175es_ES
dc.relation.projectIDGobierno de España. RTI2018-099668-BC22es_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES


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