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Giant Enhancement in the Supercapacitance of NiFe-Graphene Nanocomposites Induced by a Magnetic Field

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Giant Enhancement in the Supercapacitance of NiFe-Graphene Nanocomposites Induced by a Magnetic Field

dc.contributor.author	Romero Pascual, Jorge
dc.contributor.author	Prima García, Helena
dc.contributor.author	Varela, Maria
dc.contributor.author	Gómez Miralles, Sara
dc.contributor.author	Oestreicher, Víctor
dc.contributor.author	Abellán Sáez, Gonzalo
dc.contributor.author	Coronado Miralles, Eugenio
dc.date.accessioned	2020-05-13T10:09:18Z
dc.date.available	2020-05-13T10:09:18Z
dc.date.issued	2019
dc.identifier.citation	Romero Pascual, Jorge Prima García, Helena Varela, Maria Gómez Miralles, Sara Oestreicher, Víctor Abellán Sáez, Gonzalo Coronado Miralles, Eugenio 2019 Giant Enhancement in the Supercapacitance of NiFe-Graphene Nanocomposites Induced by a Magnetic Field Advanced Materials 31 28 1900189
dc.identifier.uri	https://hdl.handle.net/10550/74596
dc.description.abstract	The rapid rise in energy demand in the past years has prompted a search for low-cost alternatives for energy storage, supercapacitors being one of the most important devices. It is shown that a dramatic enhancement (≈1100%, from 155 to 1850 F g−1) of the specific capacitance of a hybrid stimuli-responsive FeNi3-graphene electrode material can be achieved when the charge/ discharge cycling is performed in the presence of an applied magnetic field of 4000 G. This result is related to an unprecedented magnetic-field-induced metal segregation of the FeNi3 nanoparticles during the cycling, which results in the appearance of small Ni clusters (<5 nm) and, consequently, in an increase in pseudocapacitive sites. The results open the door to a systematic improvement of the capacitance values of hybrid supercapacitors, while moving the research in this area towards the development of magnetically addressable energy-storage devices.
dc.language.iso	eng
dc.relation.ispartof	Advanced Materials, 2019, vol. 31, num. 28, p. 1900189
dc.subject	Materials
dc.subject	Energia
dc.title	Giant Enhancement in the Supercapacitance of NiFe-Graphene Nanocomposites Induced by a Magnetic Field
dc.type	journal article	es_ES
dc.date.updated	2020-05-13T10:09:19Z
dc.identifier.doi	10.1002/adma.201900189
dc.identifier.idgrec	136737
dc.rights.accessRights	open access	es_ES