Expanding Interlayer Spacing in MoS2 for Realizing an Advanced Supercapacitor

Sarkar, Debasish and Das, Debanjan and Das, Shyamashis and Kumar, Ankit and Patil, Satish and Nanda, Karuna Kar and Sarma, D D and Shukla, Ashok (2019) Expanding Interlayer Spacing in MoS2 for Realizing an Advanced Supercapacitor. In: ACS ENERGY LETTERS, 4 (7). pp. 1602-1609.

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Abstract

Charge-storage mechanism of free-standing MoS2/r-GO (r-GO = reduced graphene oxide) hybrid nanoflakes on molybdenum (Mo) foil in Na2SO4 solution is elucidated for realizing a high-performance asymmetric supercapacitor (ASC). Thiourea that acts primarily as sulfur source also helps intercalating ammonium ions, which along with r-GO facilitate in situ exfoliation of MoS2, producing hierarchical MoS2 with expanded interlayer spacing. This interlayer expansion in MoS2 facilitates Nations intercalation/deintercalation and ensures enhanced capacitance, rate capability, and cycling stability of the capacitor. Besides exhibiting attractive energy-cum-power traits, the 2 V MoS2/r-GO//Fe2O3/MnO2 ASC shows compelling cycling performance for over 20 000 cycles in an aqueous electrolyte.

Item Type:	Journal Article
Publication:	ACS ENERGY LETTERS
Publisher:	AMER CHEMICAL SOC
Additional Information:	copyright for this article belongs to AMER CHEMICAL SOC
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	05 Aug 2019 09:56
Last Modified:	05 Aug 2019 09:56
URI:	http://eprints.iisc.ac.in/id/eprint/63378

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