The rapid global transition toward sustainable energy technologies has significantly accelerated research on advanced materials and electrochemical systems for next-generation energy storage and conversion applications. This Special Issue aims to highlight recent developments in innovative materials, device architectures, and electrochemical strategies that address critical challenges in energy sustainability, efficiency, stability, and scalability. Particular emphasis is placed on emerging battery technologies, supercapacitors, electrocatalytic systems, hydrogen energy technologies, and advanced electrolyte engineering for high-performance electrochemical devices.

The Special Issue welcomes original research articles and comprehensive reviews focusing on the design, synthesis, characterization, modeling, and practical implementation of functional materials for sustainable energy applications. Contributions exploring solid-state and gel electrolytes, hybrid energy storage systems, AI/ML-assisted materials discovery, electrochemical interfaces, nanostructured materials, and sustainable energy conversion mechanisms are particularly encouraged. Interdisciplinary studies integrating materials science, electrochemistry, computational modeling, and sustainable engineering approaches are also within the scope of this issue.

This Special Issue aims to provide an international platform for researchers and scientists to present cutting-edge advancements that can contribute toward clean, efficient, and sustainable energy technologies for future societal and industrial needs.