Recent advancements in TiFe alloy for solid-state hydrogen storage: From synthesis to performance

This review delves into the advancements of TiFe alloy for solid-state hydrogen storage, highlighting its structure, properties, preparation method, and hydrogen storage performance. The impact of alloy composition and microstructure of the TiFe alloy upon the hydrogen storage kinetics were explored and summarized, as well as on hydrogen storage capacity. The work details the synthesis methods, from induction melting to mechanical alloying, and discusses strategies to enhance TiFe's hydrogen absorption/desorption rates and cycling stability. Emphasis is placed on the role of process control agents and nanostructuring in improving the hydrogen storage performance of TiFe alloy. This review underscores the potential of TiFe alloys in realizing a sustainable hydrogen economy and outlines challenges in activation conditions and cost reduction, providing a roadmap for future research directions.