Evaluating Electrolyte–Anode Interface Stability in Sodium All-Solid-State Batteries
Grayson Deysher, Yu‐Ting Chen, Baharak Sayahpour, Sharon Wan-Hsuan Lin, So‐Yeon Ham, Phillip Ridley, Ashley Cronk, Erik A. Wu, Darren H. S. Tan, Jean‐Marie Doux, Jin An Sam Oh, Jihyun Jang, Long H. B. Nguyen, Ying Shirley Meng
Abstract
. Focused ion beam scanning electron microscopy (FIB-SEM) imaging, X-ray photoelectron spectroscopy (XPS), and electrochemical impedance spectroscopy (EIS) were utilized to characterize the evolution of the anode-electrolyte interface upon electrochemical cycling. The obtained results revealed that the interface stability is determined by both the intrinsic electrochemical stability of the solid electrolyte and the passivating properties of the formed interfacial products. With appropriate material selection for stability at the respective anode and cathode interfaces, stable cycling performance can be achieved for Na all-solid-state batteries.