Formation of Hierarchical 2D-Mos2 Nanostructures over Carbon Fabric as Binder Free Electrode Material for Supercapacitor Applications

Chellamuthu Muthamizhchelvan,Hiroya Ikeda,Selvaraj Shanthi,Suru Ponnusamy,Yasuhiro Hayakawa

doi:10.24297/jap.v15i0.7863

Abstract

Carbon fabrics are the new generation promising electrode materials for super capacitors owing to their high electrical conductivity, high chemical stability and low thermal expansion. In this work, 2D-MoS2 nanostructures have been successfully deposited over the commercially available carbon fabric by hydrothermal approach, using silicontungstic acid as an additive. MoS2 nanostructures – carbon fabric was broadly characterized using XRD, FESEM and Raman Spectroscopy. XRD patterns indicated that the fabricated MoS2 nanoparticles can be indexed to hexagonal (2H) and rhombohedral (3R) phases. FESEM images revealed the formation of hierarchical 2D MoS2 nanosheets arranged in a nanosphere like morphology over the carbon fabric. The electrochemical behavior of the MoS2 - carbon fabric and commercially available bare carbon fabric were studied using cyclic voltammetry analysis with different scan rates. The MoS2-carbon fabric exhibited an excellent electrochemical performance with a specific capacitance of 441 F/g at a scan rate of 10mV/s. The good cyclic behavior with symmetric charging/discharging curves, constant specific capacitance for longer scan rates, suggesting that the MoS2- carbon fabric electrode is a potential electrode material for high power applications.

Highlights

Supercapacitors, known as electrochemical capacitors, have been acknowledged for over fifty years and considered as one of the potential energy storage systems in addition to batteries, for various diverse applications such as portable electronics, surge power delivery devices for electric vehicles and digital calipers [1]
The electrode materials for supercapacitor falls under three categories namely electrical double layer capacitors (EDLC), pseudocapacitors and hybrid capacitors [2,3,4,5,6,7]
We report the simple hydrothermal synthesis of agglomerated 2D MoS2 nanosheets arranged over the commercially available carbon fabric (CF), like 2D MoS2 nanospheres morphology

Summary

Introduction

Supercapacitors, known as electrochemical capacitors, have been acknowledged for over fifty years and considered as one of the potential energy storage systems in addition to batteries, for various diverse applications such as portable electronics, surge power delivery devices for electric vehicles and digital calipers [1]. In EDLC, the electrical energy can be stored based on the following phenomena of either charge accumulation at the electrode and electrolyte interface, e.g., carbon-based materials and graphene, which has high surface area, excellent electrical conductivity.

Results

Conclusion