Jump to main content
Jump to site search


Electrochemical studies on crystalline CuS as an electrode material for non-aqueous Na-ion capacitors

Author affiliations

Abstract

Current investigations are concentrated on the development of high-performance electrode materials for sodium-ion capacitors (NICs). Copper sulphide can be employed as an electrode material for sodium-ion capacitors owing to its electrical conductivity and specific capacity. Crystalline CuS provides a large surface area for Na insertion/extraction. In this context, we have reported CuS powder synthesised via a simple wet chemical route. XRD and FT-IR studies have been carried out to determine the phase formation and confirm the purity of the CuS powder. A specific surface area of 62 m2 g−1 is measured by a BET surface area analyser. NICs were assembled in a non-aqueous medium with CuS particles and investigated for charge–discharge cycling in the potential window from 0.01 to 3 V. Cyclic voltammetry (CV) confirmed that at a high scan rate from 10 mV s−1 to 100 mV s−1, the CuS particles showed ideal capacitive behaviour. The calculated value of specific capacitance was 160 F g−1 for the CuS particles. At a scan rate of 1 mV s−1, 74.8% capacitive contribution was obtained from the CuS particles. Electrochemical impedance spectroscopy (EIS) revealed the interfacial interactions of the CuS particles with an Na-based electrolyte.

Graphical abstract: Electrochemical studies on crystalline CuS as an electrode material for non-aqueous Na-ion capacitors

Back to tab navigation

Supplementary files

Article information


Submitted
31 Dec 2019
Accepted
03 Mar 2020
First published
03 Mar 2020

New J. Chem., 2020, Advance Article
Article type
Paper

Electrochemical studies on crystalline CuS as an electrode material for non-aqueous Na-ion capacitors

M. Goswami, C. Nithya, N. Sathish, S. Kumar, N. Singh, A. K. Srivastava and S. Kumar, New J. Chem., 2020, Advance Article , DOI: 10.1039/C9NJ06465F

Social activity

Search articles by author

Spotlight

Advertisements