In this work new energy storage components were prepared depositing films made of polyaniline (PANI) modified with gold/magnetite nanoparticles on flexible graphite foils. Three types of composite materials termed PANI/Fe3O4, PANI/Au/Fe3O4 and PANI/Au/Fe3O4@Yne (where @Yne is a propynylcarbamate group) were obtained by electrosynthesis. Galvanostatic charge-discharge (CD) and impedance tests (EIS) were performed to verify their efficiency in charge storage properties: for the gold-containing electrodes PANI/Au/Fe3O4 and PANI/Au/Fe3O4@Yne areal capacities values of 45.6 and 46.5 mAh cm(-2) were found in 0.5 M H2SO4 + 0.1 M LiCIO4 electrolyte solution at a current density of 0.5 mA cm(-2). These values are twofold higher than those found for PANI/Fe3O4 electrodes and fourfold greater than those for PANI alone (11.0 mAh cm(-2)). In turn PANI/Au/Fe3O4 and PANI/Au/Fe3O4@Yne were employed to assemble gel-state symmetric devices. CD, EIS and longtime resistance tests were made on the new devices that displayed an areal capacities of 100.0 mAh cm(-2) for PANI/Au/Fe3O4 and 73.6 mAh cm(-2) PANI/Au/Fe3O4@Yne respectively. To our knowledge this is the first time that AuNP-modified magnetite nanoparticles are used in energy storage devices preparation. (C) 2019 Elsevier Ltd. All rights reserved.
PANI/Au/Fe3O4 nanocomposite materials for high performance energy storage / Ballarin B.; Boanini E.; Montalto L.; Mengucci P.; Nanni D.; Parise C.; Ragazzini I.; Rinaldi D.; Sangiorgi N.; Sanson A.; Cassani M.C.. - In: ELECTROCHIMICA ACTA. - ISSN 0013-4686. - STAMPA. - 322:(2019), pp. 134707.134707-134707.134713. [10.1016/j.electacta.2019.134707]
PANI/Au/Fe3O4 nanocomposite materials for high performance energy storage
Ballarin B.
;Boanini E.;Nanni D.;Parise C.;Ragazzini I.;Cassani M. C.
2019
Abstract
In this work new energy storage components were prepared depositing films made of polyaniline (PANI) modified with gold/magnetite nanoparticles on flexible graphite foils. Three types of composite materials termed PANI/Fe3O4, PANI/Au/Fe3O4 and PANI/Au/Fe3O4@Yne (where @Yne is a propynylcarbamate group) were obtained by electrosynthesis. Galvanostatic charge-discharge (CD) and impedance tests (EIS) were performed to verify their efficiency in charge storage properties: for the gold-containing electrodes PANI/Au/Fe3O4 and PANI/Au/Fe3O4@Yne areal capacities values of 45.6 and 46.5 mAh cm(-2) were found in 0.5 M H2SO4 + 0.1 M LiCIO4 electrolyte solution at a current density of 0.5 mA cm(-2). These values are twofold higher than those found for PANI/Fe3O4 electrodes and fourfold greater than those for PANI alone (11.0 mAh cm(-2)). In turn PANI/Au/Fe3O4 and PANI/Au/Fe3O4@Yne were employed to assemble gel-state symmetric devices. CD, EIS and longtime resistance tests were made on the new devices that displayed an areal capacities of 100.0 mAh cm(-2) for PANI/Au/Fe3O4 and 73.6 mAh cm(-2) PANI/Au/Fe3O4@Yne respectively. To our knowledge this is the first time that AuNP-modified magnetite nanoparticles are used in energy storage devices preparation. (C) 2019 Elsevier Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.