Development of Operando Spectroscopy for Integrated Electrode-Electrolyte Design of Electrochemical Energy Conversion and Storage Devices

Dr. Katayama developed an analytical method that enables molecular-level, real-time observation of reactions at the electrode-electrolyte interface in electrochemical energy conversion and storage devices, including batteries, fuel cells, and hydrogen production systems. Whereas efforts to improve performance had traditionally focused primarily on electrode materials, this work demonstrated that optimizing the entire reaction environment, including the electrolyte, is equally important. By applying operando spectroscopy* to a wide range of electrochemical reactions, the study established a framework that links reaction-mechanism analysis, materials design, and performance evaluation in a single workflow. It enables an integrated design approach that treats electrodes and electrolytes as a unified system. The work contributes to hydrogen carrier production, carbon dioxide utilization, and improved battery and fuel-cell performance.