Researchers from Shibaura Institute of Technology have published a study in ACS Applied Energy Materials showcasing an innovative approach to measure the intrinsic hydride-ion conductivity of perovskite hydrides. Perovskite hydrides, containing hydrogen anions, are significant for their potential applications in hydrogen-related technologies such as fuel cells and energy-saving superconducting cables. The study aimed to overcome the challenges in characterizing perovskite hydrides by creating high-quality thin-film single crystals using a novel laser deposition technique in an H-radical atmosphere. By synthesizing single-phase hydride thin films through 'H-radical reactive infrared laser deposition,' the researchers were able to analyze the conductivity of these materials accurately. Various advanced methods were employed to determine the crystal quality and elemental distribution in the thin films. This breakthrough allowed for the first measurements of intrinsic hydride-ion conductivity in these crystals, providing valuable insights for potential applications in energy systems. The research, supported by funding from the Japan Society for the Promotion of Science, has the potential to impact the development of novel technologies like secondary batteries and fuel cells, contributing to the advancement of sustainable energy solutions.