Ultrahigh-Rate Supercapacitors Based on 2-Dimensional, 1T MoS2xSe2(1-x) for AC Line-Filtering Applications

Sellam, A and Jenjeti, Ramesh Naidu and Sampath, S (2018) Ultrahigh-Rate Supercapacitors Based on 2-Dimensional, 1T MoS2xSe2(1-x) for AC Line-Filtering Applications. In: JOURNAL OF PHYSICAL CHEMISTRY C, 122 (25, SI). pp. 14186-14194.

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Abstract

Motivated by the presence of metallic conductivity in the group VI transition metal dichalcogenides, the supercapacitive performance of the 1T phase of molybdenum (MoS2xSe2(1-x))) sulfoselenides is explored. Ultrahigh frequency response (similar to 1.4 kHz) along with excellent electrochemical stability are exhibited by 1T MoS2xSe2(1-x)-based super capacitors. The S:Se ratio in the mixed chalcogenide is shown to influence the rate performance of the device. High areal capacitances of similar to 450 mu F cm(-2) with short RC time constants of similar to 1.3-3.2 ms at 120 Hz are achieved in the case of 1T MoSSe phase. The i-v characteristics are almost rectangular at very high scan rates of similar to 1000 V s(-1). Very stable gravimetric specific capacitance of similar to 36 F g(-1) is retained for several thousands of charge-discharge cycles leading to an energy density of similar to 12.1 Wh kg(-1) at a specific power of similar to 842 W The observed specific power of similar to 50 kW kg(-1) at similar to 1.5 Wh kg(-1) energy density makes the sulfoselenide phase capacitors attractive for high power applications without compromising on the energy density.

Item Type:	Journal Article
Publication:	JOURNAL OF PHYSICAL CHEMISTRY C
Publisher:	AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Additional Information:	Copyright of this article belong to AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	02 Aug 2018 15:47
Last Modified:	02 Aug 2018 15:47
URI:	http://eprints.iisc.ac.in/id/eprint/60345

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