This book covers nanostructure materials for application as supercapacitors. It highlights the properties that make them ideal for energy storage applications. It reports approaches on their electronic, electrical, thermal properties to increase their specific surfaces in order to improve their electrical storage capacities. This book consolidates information on synthesis, characterization and application for supercapacitors with detailed characterization, mechanistic approaches and theoretical consideration. The progress in experimental and theoretical studies on various properties of nanomaterials and its polymer and other composites are described in detail.