Li/Mg‐Based Hydrides for High‐Capacity Hydrogen and Lithium Storage Applications

Abstract The rapid development of energy storage systems with high energy density and safety is crucial to meet the increasing demand for renewable energy storage and portable electronics. Li/Mg‐based hydrides have gained significant attention for both hydrogen and lithium storage due to their lightweight composition and high hydrogen content. Recent advancements in catalytic design, thermodynamic tuning, nanostructuring, and external field‐driven methods have markedly enhanced their hydrogen storage performance. For lithium storage, strategies to optimize ion transport and structural stability have improved ionic conductivity, reaction kinetics, and reversibility, enabling the development of high‐performance energy storage systems. This review provides a detailed analysis of the progress, challenges, and opportunities in Li/Mg‐based hydrides. It emphasizes breakthroughs in material modification, innovative synthesis methods, and performance optimization, showcasing their potential in hydrogen and lithium storage applications. Key challenges include balancing catalytic and thermodynamic regulation and exploring new driving methods for hydrogen storage, while enhancing ionic conductivity and refining doping techniques for lithium storage remain critical. By integrating insights into their dual roles, this work lays a strong foundation for the continued development and application of Li/Mg‐based hydrides in next‐generation energy storage technologies.