Alloys for Reversible Hydrogen Storage The process developed by MBN are suited to the production of advanced intermetallic hydride powders for solid-state hydrogen storage systems, including AB₅-type, AB₂-type, and AB-type alloy families. These hydrogen storage materials are engineered using mechanical alloying process, enabling synthesis of complex multicomponent intermetallic systems with precise compositional control and nanostructured morphology. The flexibility of solid-state processing allows both A-site substitution (rare-earth or alkaline-earth elements) and B-site substitution (transition metals) within the crystallographic lattice, enabling creation of optimized hydrogen storage alloys beyond conventional binary compositions. This compositional tuning capability allows optimization of critical storage properties: ◉ Hydrogen storage capacity (wt% and volumetric density) ◉ Equilibrium plateau pressure (matching operating conditions) ◉ Absorption/desorption temperatures (ambient to 100 °C) ◉ Cycling stability and degradation resistance (>10,000 cycles) ◉ Activation behavior (initial hydrogenation requirements) The nanocrystalline grain structure achieved through high-energy ball milling (grain size 20-100 nm) significantly enhances hydrogen diffusion kinetics through grain boundary networks, dramatically improving hydrogen absorption rates and desorption kinetics compared to cast or arc-melted alloys. Additionally, in-situ dispersion of catalytic nano-oxides (TiO₂, Nb₂O₅, V₂O₅ catalysts) during processing promotes efficient H₂ molecule dissociation into atomic hydrogen at the alloy surface, further boosting reaction kinetics, storage efficiency, and low-temperature performance. The metal hydride powders can serve stationary hydrogen storage applications (renewable energy buffering, backup power), mobile hydrogen systems (fuel cell vehicles, maritime applications), and niche portable power solutions, offering a safe, compact, and fully reversible hydrogen storage technology operating at near-ambient temperatures and moderate pressures (1-30 bar). MBN provides custom metal hydride alloy development services to meet specific pressure-temperature requirements, capacity targets, kinetics specifications, and system integration constraints. PROPERTIES AB₅-Type Alloys (LaNi₅-based) Hydrogen capacity 1.3-1.5 wt% (reversible) Plateau pressure 2-10 bar at 25 °C Operating temperature 0-80 °C AB₂-Type Alloys (TiV₂-based, Laves phase) Hydrogen capacity 1.8-2.2 wt% Plateau pressure 5-50 bar at 25 °C (tunable) Operating temperature 20-100 °C AB-Type Alloys (FeTi-based) Hydrogen capacity 1.5-1.9 wt% Plateau pressure 5-20 bar at 25-50 °C Operating temperature 20-80 °C Powder Characteristics Particle size 10-150 µm (application-optimized) Grain size 20-100 nm (nanocrystalline) Catalyst loading 0.5-3 wt% (optional) Delivered condition Activated or as-synthesized
