Fast Lithium-Ion Conduction Solid State-Electrolytes

Abstract

Interest in solid-state electrolytes has grown rapidly in recent years owing to the desire to utilize lithium metal anode for improved specific energy density and the inherent safety advantage of a non-flammable solid state electrolyte. A practical solid electrolyte for energy storage must be a fast ion conductor, have negligible electronic conductivity and adequate chemical and electrochemical stability with electrodes. For ease of manufacturing and potentially higher power capability we have focused research on oxide ceramic electrolytes. This work will cover our work on NASICON, perovskite, garnet and other potential structural families including how to stabilize the most conductive phase and maximize the ionic conductivity through substitutional chemistry. Our main focus on garnet will include how to understand important mechanical properties, the air and moisture stability and stability with cathode materials, improvement of critical current density and future challenges and opportunities for garnet based fast lithium ion electrolytes and potential new materials.