Increasing demand for clean and sustainable energy, with a rise in technology, has pushed us to investigate clean energy sources and their storage. Batteries and supercapacitors are electrochemical storage devices that have applications both in the industry as well as in portable electronics. Supercapacitors are energy storage devices that store electrical energy through an adsorption/desorption of ions or pseudo-capacitive faradaic reactions at the electrode-electrolyte interfaces. Supercapacitors can be a replacement for batteries during high power output events and can have a near indefinite cycling life. High-power density, high-rate capability, and performance at high-frequency are the most desirable properties for a supercapacitor. Hence, my research focused on engineering the supercapacitor electrodes as well as designing the supercapacitor of desired form factors for various applications.