Energy Storage Systems Using 2D Carbon Based Nanocomposites as Electrodes

Different allotropes of carbon, such as graphene and carbon nanotubes, have the potential for use in applications such as clean energy storage systems, aerospace, and energy conversion. In this work, the development of graphene-based nanocomposites (GNCs) for use in an ultracapacitor is investigated. GNCs can be used in ultracapacitors because of their superior electrochemical properties providing superior energy storage performance. Device miniaturization is also possible to facilitate a vast number of applications. In this experimental work, GNCs will be synthesized using an electrochemical deposition technique and the performance of the electrode will be evaluated using various electrochemical studies in the presence of an aqueous electrolyte. Distinct Faradaic and non-Faradaic charge transfer mechanisms will be investigated using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge-discharge (GCD) studies. Results of different rates of deposition during synthesis and their effect on performance will be presented. The role of different substrates, electrolytes, and their effect on the performance of the device will be discussed. Mechanisms of charge storage and transfer between the electrolyte and GNC surface will be presented