Na-ion Solid Electrolytes for Solid-state Batteries

Abstract

Solid-state sodium-ion batteries have gradually become a research hotspot in the field of energy storage, with their significant advantages of high safety and low cost. The inorganic solid electrolyte system has high ionic conductivity and high ion migration number, and has significant advantages in terms of mechanical properties and stability. Different types of solid electrolyte face problems such as low ion conductivity and poor electrochemical stability. Chapter 7 introduces the migration mechanism of sodium ions in solids, and comprehensively discusses the research progress on sodium-ion solid electrolytes, such as oxides, sulfides, and complex hydrides. The chapter introduces improvement strategies for electrolyte ionic conductivity and electrochemical stability for different crystal structures. Finally, a summary of the current status of solid sodium-ion electrolytes is given and the challenges faced for future trends in development are presented.