Ultrasonically assisted microwave synthesis of nanostructured FeCo 2 O 4 as potential cathode materials for supercapacit
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Ultrasonically assisted microwave synthesis of nanostructured FeCo2O4 as potential cathode materials for supercapacitors Paresh Salame1,* 1
and Karan Kotalgi1
Department of Physics, Institute of Chemical Technology Mumbai, Matunga, Mumbai 400019, India
Received: 27 June 2020
ABSTRACT
Accepted: 20 September 2020
Iron Cobaltite (FeCo2O4) is successfully prepared in a single-phase form via wetchemical route with assistance from high power (150 W) ultrasound. The synthesis process was further hastened by utilizing the power of uniform microwave heating for solid-state reaction in lieu of conventional heating. We were able to achieve single-phase FeCo2O4 by calcinating sonicated solution at 400 °C for 6 h. The use of these accelerated synthesis techniques could accelerate the nucleation rate, and thus could result in reduction of phase formation temperature/time. This eventually resulted in nanoparticles formation with average particle size of * 200 nm. The electrochemical performance of the material was tested in a three-electrode system, with FeCo2O4 compound showing a high specific capacitance of 784 Fg-1 at 2 mVs-1. The electrochemical performance demonstrated by the FeCo2O4 put its candidature as a potential cathode material for supercapacitor application.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction With ever-growing population and increase in the consumption of fossil fuel for powering our daily lives has led to grueling effects on the environment as well as public health in general. In our effort of reducing the dependence on traditional fossil fuel for energy generation and consumption, researchers are finding new, resourceful, green energy-based applications and devices [1–3]. For electrical energy storage (EES), lithium-ion batteries, hydrogen fuel cells, supercapacitors, etc., have been used so far for various applications. Among these EES devices,
supercapacitors have attracted a lot of attention due to its high power density, long cyclic life and the capability of fast recharging as compared to secondary rechargeable batteries [3, 4]. At present, researchers are exploring newer and better materials for making more efficient Supercapacitors (SCs). Many materials have been investigated so far for application in supercapacitors viz. carbon and carbon nanostructures, transition metal oxides/sulfides, etc. The electrical conductivity of transition metal-based SC is found to be low; carbon is thus added to make the composite suitable for SC device application. However, metal oxides display faradic redox
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https://doi.org/10.1007/s10854-020-04528-8
J Mater Sci: Mater Electron
reactions, which helps in generating (pseudo)capacitance. Further, these reduced/oxidized ions can adsorb/desorb on the various interfaces of the supercapacitor, thereby increasing the overall capacitance, which is usually much higher than purely carbon-based electrode materials. Moreover, it was the deve
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