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Ultrahigh Rate Supercapacitor based on Self-Standing Carbon Nanotubes Supported Vertically Aligned MoS2 Sheets

Published online by Cambridge University Press:  01 September 2020

Pranjala TiwariOpen the ORCID record for Pranjala Tiwari[Opens in a new window],
Dawid Janas and
Ramesh Chandra
Pranjala Tiwari*
Affiliation:
Nanoscience Laboratory, Indian Institute of Technology Roorkee, Roorkee 247667, India.
Dawid Janas
Affiliation:
Silesian University of Technology, B. Krzywoustego 4, 44-100 Gliwice, Poland
Ramesh Chandra*
Affiliation:
Nanoscience Laboratory, Indian Institute of Technology Roorkee, Roorkee 247667, India.
*
*Corresponding author E-mail address: pranjala28@gmail.com, ramesh.chandra@ic.iitr.ac.in
*Corresponding author E-mail address: pranjala28@gmail.com, ramesh.chandra@ic.iitr.ac.in
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Abstract

Recently, two-dimensional layered structures, especially MoS2 has come out as the most investigated electrode material for batteries and supercapacitors, possessing well preserved in-plane covalent bonding, leading to extraordinary mechanical elasticity within the layers as well as outstanding firmness along the c-axis. The present work is aimed to fabricate vertically aligned edge exposed molybdenum disulfide nanoflakes on the surface of the self-standing hydrophilic carbon nanotubes, using a two-step process involving a chemical route and magnetron sputtering techniques for flexible supercapacitor application. These hybrid heterostructures have been characterized using XRD, FESEM, and cyclic voltammetry. In the aqueous electrolyte of 1M Li2SO4, the symmetric device revealed very high areal capacitance of 182.5 mF/cm2 and 155 mF/cm2, at scan rates of 2 and 5 mV/s, respectively. The device shows high energy density of 365 mWh/cm2.

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Articles
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MRS Advances , Volume 5 , Issue 48-49: Energy, Storage and Conversion , 2020, pp. 2495 - 2502
Copyright
Copyright © Materials Research Society 2020

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