Synthesis of Molybdenum Sulfide/Tellurium Hetero-Composite by a Simple One-Pot Hydrothermal Technique for High-Performance Supercapacitor Electrode Material.

Hyojae Kim,Hem Prakash Karki,Jonghyun Oh,Jinmu Jung

doi:10.3390/nano11092346

Abstract

It is necessary to investigate effective energy storage devices that can fulfill the requirements of short-term and long-term durable energy outputs. Here, we report a simple one-pot hydrothermal technique through which to fabricate the MoS2/Te nanocomposite to be used as an effective electrode material for high-performance supercapacitors. Comprehensive characterization of the as-fabricated nanomaterial was performed using FESEM, HRTEM, XRD, FTIR, XPS, etc., as well as electrochemical characterizations. The electrochemical characterization of the as-fabricated nanocomposite electrode material showed a high specific capacitance of 402.53 F g−1 from a galvanostatic charge-discharge (GCD) profile conducted at 1 A g−1 current density. The electrode material also showed significant rate performance with high cyclic stability reaching up to 92.30% under 4000 cycles of galvanostatic charge-discharge profile at a current density of 10 A g−1. The highly encouraging results obtained using this simple synthetic approach demonstrate that the hetero-structured nanocomposite of MoS2/Te electrode material could serve as a promising composite to use in effective supercapacitors or energy storage devices.

Highlights

Fossil fuels, which are limited natural resources, are being highly exploited due to the urgent need to meet the higher energy demands of society as well as the fast pace of technical advancements in the twenty-first century [1,2,3,4]
Batteries are highly attractive due to their higher energy density, but they possess limited power density compared to that required for the prolonged use of energy
Nanocomposite materials were successfully prepared by a simple one-pot hydrothermal technique

Summary

Introduction

Fossil fuels, which are limited natural resources, are being highly exploited due to the urgent need to meet the higher energy demands of society as well as the fast pace of technical advancements in the twenty-first century [1,2,3,4]. Batteries are highly attractive due to their higher energy density, but they possess limited power density compared to that required for the prolonged use of energy. Traditional capacitors deliver high power density, but they have low energy storage [9,10,11]. The limitations of both batteries and conventional capacitors, along with the gaps between their performances, can be managed with the intensive exploration of special types of contemporary energy storage tools and techniques, such as electrochemical capacitors, supercapacitors, and ultracapacitors [12]

Methods

Results

Conclusion