Characterizing Interface Chemistry in All-solid-state Sodium Batteries

Reaction at the electrolyte/electrode interface is the critical factor dictating the life-time of all-solid-state batteries. Characterize that reaction kinetically is the key to understand decomposition mechanism and develop a protection for longer life-time and enhanced performance. In this project, we optimized the spectroelectrochemical reaction cell design and achieve the real-time Raman/XRD characterization of interfacial degradation evolution in a cycling battery. Beyond pristine electrolyte, impacts of two common modification on it, doping (W doping) and coating (CMC coating), will also be analyzed to obtain a comprehensive picture of their contribution in cycling performance. The ultimate goal of this project to develop and apply this methodology to all components of all-solid-state batteries for a complete kinetic story in batteries decaying and protection.