This book explores cutting-edge advancements in sustainable energy. It is written by leading experts in the field, covering topics such as advanced energy materials—including organic solar cells and manganese-based batteries—alongside breakthroughs in energy conversion, storage, and AI applications. It demonstrates how superconducting power transmission and AI algorithms are revolutionizing power systems and explores strategies for integrating energy solutions into sustainable urban infrastructure. The book equips researchers, engineers, and policymakers with the knowledge to navigate the complexities of modern energy challenges.