This book presents a comprehensive exploration of next-generation smart energy storage systems and their integration into modern energy networks. It highlights the convergence of enabling technologies-Artificial Intelligence (AI), the Internet of Things (IoT), blockchain, and digital twins-in transforming conventional storage platforms into adaptive, data-driven, and resilient infrastructures. Covering state-of-the-art advances in emerging energy storage technologies, the book emphasizes AI-enabled energy management, predictive diagnostics, and cybersecurity, while bridging theory with real-world applications through practical case studies and industry trends. Aligned with key United Nations Sustainable Development Goals, it serves as an interdisciplinary reference for researchers, engineers, policymakers, and students advancing intelligent and sustainable energy storage for a decarbonized future.