Novel electrode geometry for high performance CF/Fe2O3based planar solid state micro-electrochemical capacitors

Kumar, S and Telpande, S and Manikandan, V and Kumar, P and Misra, A (2020) Novel electrode geometry for high performance CF/Fe2O3based planar solid state micro-electrochemical capacitors. In: Nanoscale, 12 (37). pp. 19438-19449.

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Abstract

A novel geometry of sharp-edged electrodes for planar micro-electrochemical capacitors is utilized for an enhanced performance compared to the conventionally used interdigitated electrodes. The sharp-edged electrode geometry achieves a 68 enhancement in the electric field at the sharp-edge of the electrodes as compared to interdigitated electrodes. Moreover, carbon foam with high specific surface area loaded with iron oxide nanoparticles allows a large mass loading for the pseudocapacitance in addition to electric double layer capacitance (EDLC). Thus, an enhancement of 235 was obtained in both the areal specific capacitance and energy density when the performance was compared with the interdigitated electrode based supercapacitors. Moreover, an excellent cycling stability (~99.5) over 10000 charge-discharge cycles was also achieved. The high-performance architecture of sharp-edged electrodes paves a way for smart electrochemical capacitors using an efficient planar structure in combination with high-loading materials for large pseudocapacitance as well as EDLC. © 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:	Capacitance; Chemical sensors; Electric discharges; Foams; Geometry; Iron oxides; Magnetic nanoparticles, Charge-discharge cycle; Electric double layer capacitance; Electrochemical capacitor; High performance architectures; High specific surface area; Inter-digitated electrodes; Iron oxide nanoparticle; Specific capacitance, Electrochemical electrodes
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	13 Feb 2023 04:08
Last Modified:	13 Feb 2023 04:08
URI:	https://eprints.iisc.ac.in/id/eprint/80194

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