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

Romero J, Prima-Garcia H, Varela M, Miralles SG, Oestreicher V, Abellán G, Coronado E (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Advanced Materials Wiley

Article Number: 1900189

DOI: 10.1002/adma.201900189

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 FeNi 3 –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 FeNi 3 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.

Authors with CRIS profile

Gonzalo Abellan Saez Zentralinstitut für Neue Materialien und Prozesstechnik

Involved external institutions

University of València / Universitat de València ES Spain (ES) Universidad Complutense de Madrid (UCM) ES Spain (ES)

How to cite

APA:

Romero, J., Prima-Garcia, H., Varela, M., Miralles, S.G., Oestreicher, V., Abellán, G., & Coronado, E. (2019). Giant Enhancement in the Supercapacitance of NiFe–Graphene Nanocomposites Induced by a Magnetic Field. Advanced Materials. https://dx.doi.org/10.1002/adma.201900189

MLA:

Romero, Jorge, et al. "Giant Enhancement in the Supercapacitance of NiFe–Graphene Nanocomposites Induced by a Magnetic Field." Advanced Materials (2019).

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