Investigation on supercapacitive characteristics of metal oxide graphene nanocomposites for energy storage applications

Abstract

The improvement of alternative energy storage systems is absolutely one of the greatest challenges facing by our recent society as a result of emerging energy necessities and environmental concerns over fossil fuels. Recently, ultracapacitors have gained much attention due to their high power density than batteries, energy density than conventional capacitors, flexibility, long life and low cost. In order to make the efficient usage of these immobile energy storage devices, state-of-the-art research on new and advanced electrode materials is highly required. Recognition of nanomaterial for supercapacitor has given the new lengthy platform to the researchers in order to develop suitable electrode materials with high energy and power density. The main focus of this thesis is to improve high accomplishment supercapacitor electrodes through simple and cost effective methods appropriate for industrial and commercial use. The materials reported herein are metal oxide decorated into graphene sheets to produce a synergistic linkage with high conductivity. Metal oxide/graphene nanocomposite electro-active materials have been intensively explored as potential components in electrochemical energy storage device, since they provides short diffusion path lengths to ions leading to high charge and discharge rates and also exhibits excellent electrical, electrochemical, and mechanical properties for electrochemical energy storage applications. In recent years, researchers have made efforts on the development of effective methods for the preparation of TMOs with a graphene nanocmposites, as electro-active materials focusing on the enhanced performance and confirming the cost reduction of ultracapacitors. newline newline newline