Reddy, B. Narsimha and Gupta, Govind and Ingole, Pravin P. (2018) Star-Shaped CuS Flat Nanoflakes Reinforced Ni(OH)(2) Nanosheets for Enhanced Capacitance. Journal of Materials Science: Materials in Electronics, 3 (40). pp. 11293-11301. ISSN 0957-4522

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Abstract

Enhanced electrochemical capacitance of 2D-nanosheets of Ni (OH)(2) via reinforcement of star-shaped CuS flat nanoflakes synthesized using in-situ hydrothermal root is presented. Microscopic and structural characterization suggest the inclusion of CuS nanoflakes in the films. Reinforced CuS nanoflakes offer high surface area resulting into open-sheet morphologies for Ni(OH)(2)@CuS films; contrasting with the folded sheet structures attained for the neat Ni(OH)(2) films. The remarkably high bulk (10(-3) Scm(-1)) conductivity of CuS enhances the conductivity and enable facile electron transport in the composites. Asymmetric supercapacitors constructed using Ni (OH)(2)@CuS and graphite as the electrodes is noted to show specific capacitances of 642 Fg(-1) at current density of 1 Ag-1, good rate capability and excellent cycling stability (86% capacitance retention at the end of 1000 cycles) relative to the neat Ni(OH)(2) based supercapacitor cells that shows specific capacitance of 142 Fg(-1) at the same current density. The direct contact of Ni(OH)(2) with the conductive CuS nanoflakes and highly porous structures of Ni(OH)(2)@ CuS electrodes doubles the power densities of the Ni(OH)(2)@ CuS supercapacitors than Ni(OH)(2) cells due to the low ion-diffusion resistances for charging by ions from the electrolyte, afforded by the short diffusion pathways in the composites.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Springer Verlag.
Subjects:	Chemistry
Divisions:	UNSPECIFIED
Depositing User:	Mr. Yogesh Joshi
Date Deposited:	03 Apr 2019 11:38
Last Modified:	03 Apr 2019 11:38
URI:	http://npl.csircentral.net/id/eprint/4001

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