Ultrasonic atomization is a novel process that facilitates efficient production of fine spherical powders , crucial for developing high entropy alloys (HEAs) for hydrogen storage. This technique can quickly and economically atomize multiple HEAs directly from raw elements, allowing precise control over the particle size and composition, which is essential for optimizing hydrogen absorption and desorption properties.

A notable example is the TiVZrNbHf HEA, which demonstrated the capability to store up to 2.5 hydrogen atoms per metal atom, achieving a hydrogen storage density of 219 kg/m³, corresponding to an energy content of 8.5 kWh/l, approaching that of gasoline 9.5 kWh/l However, desorption occurs at elevated temperatures around 200°C. The Clean Energy Transition Partnership (CETP) Core-H2storage project will utilize ultrasonic atomization to develop HEAs with improved hydrogen storage capacity (targeting an H/M ratio of at least 2) and significantly lower desorption temperatures, aiming to achieve efficient, scalable, and sustainable hydrogen storage solutions.