This book offers a comprehensive exploration of reduced graphene oxide (rGO), a material at the forefront of energy storage technology, particularly in supercapacitors. Focused on researchers, engineers, and students in materials science and energy storage fields, this book systematically covers the synthesis, properties, and applications of rGO, emphasizing its potential to revolutionize supercapacitor performance through enhanced energy density, capacitance, and stability. This book is crucial for those involved in energy storage research and development because it addresses the growing need for materials that can offer higher energy density and better cycle life in supercapacitors. By focusing on rGO, a material that combines the best properties of graphene and graphene oxide, the book provides a pathway to overcoming the limitations of current energy storage systems. This book is designed for researchers, engineers, students, and professionals in the fields of materials science, nanotechnology, and energy storage, particularly those focused on the development of next-generation supercapacitors and related technologies.