Three-dimensional carbon foam-metal oxide-based asymmetric electrodes for high-performance solid-state micro-supercapacitors

Kumar, S and Misra, A (2021) Three-dimensional carbon foam-metal oxide-based asymmetric electrodes for high-performance solid-state micro-supercapacitors. In: Nanoscale, 13 (46). pp. 19453-19465.

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Abstract

A three-dimensional carbon foam (CF)-based asymmetric planar micro-supercapacitor is fabricated by the direct spray patterning of active materials on an array of interdigital electrodes. The solid-state asymmetric micro-supercapacitor comprises the CF network with pseudocapacitive metal oxides (manganese oxide (MnO), iron oxide (Fe2O3)), where CF-MnO composite as a positive electrode, and CF-Fe2O3 as negative electrode for superior electrochemical performance. The micro-supercapacitor, CF-MnO//CF-Fe2O3, attains an ultrahigh supercapacitance of 18.4 mF cm-2 (2326.8 mF cm-3) at a scan rate of 5 mV s-1. A wider potential window of 1.4 V is achieved with a high energy density of 5 μW h cm-2. The excellent cyclic stability is confirmed by 86.1 capacitance retention after 10�000 electrochemical cycles. © The Royal Society of Chemistry.

Item Type:	Journal Article
Publication:	Nanoscale
Publisher:	Royal Society of Chemistry
Additional Information:	The copyright for this article belongs to Royal Society of Chemistry.
Keywords:	Electrochemical electrodes; Foams; Manganese oxide; Metals; Supercapacitor, Active material; Asymmetric electrodes; Carbon foam; Interdigital electrode; Metal-oxide; Microsupercapacitors; Oxide composites; Performance; Positive electrodes; Pseudocapacitive, Hematite
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	06 Jan 2022 11:36
Last Modified:	06 Jan 2022 11:36
URI:	http://eprints.iisc.ac.in/id/eprint/70809

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