This project focuses on protonic ceramic conductors and electrolysis cells for efficient hydrogen production. Operating at lower temperatures, these cells enable the generation of high-purity, dry hydrogen and represent a promising pathway for large-scale renewable energy storage. To overcome current material limitations, we advance the design of protonic ceramics through novel sintering and characterization techniques, complemented by cross-scale simulations and machine-learning approaches. The resulting data-driven design strategies will accelerate progress in protonic ceramics and hydrogen technologies, supporting the energy transition while establishing new standards in digitalized, data-centric materials research.