As the world grapples with the dual challenges of waste management and energy sustainability, the waste-to-energy (WTE) approach has emerged as a powerful solution. By repurposing waste materials into high performance supercapacitors, we can reduce waste, promote upcycling, and provide efficient energy storage solutions for a wide range of applications in an environmentally friendly manner. This book delves into the use of processed waste materials as electrode materials for supercapacitor applications, in an intriguing effort towards promotion of environmentally friendly approaches that align with the principles of sustainability and resource utilization. Waste-derived electrodes can offer several advantages, including cost-effectiveness, reduced environmental impact, and the potential for upcycling. Written by experts in the field, this book bridges the gap between waste management and advanced energy storage technology and is an excellent companion for academics and industry workers in the fields of energy storage, materials science and environmental sustainability.