Interfacial Engineering for Lithium Metal Batteries Based on Garnet Structured Solid Fast Lithium-Ion Conductors

Abstract

Dense garnet structured solid electrolytes exhibit great promise for lithium metal batteries owing to its high lithium-ion conductivity, good mechanical and electrochemical properties. However, the rigid interfacial contact between garnet structured electrolyte and electrode stymie their practical application. In this chapter, salient features of various strategies utilized to enhance the room temperature performance of lithium metal battery based on garnet structured solid electrolyte are discussed. In particular, a detailed electrochemical investigation on lithium | garnet interface and cathode | garnet interface with buffer layers for solid-state battery. The application of garnet structured solid electrolyte in suppressing polysulfide shuttling in lithium-sulfur (Li-S) battery is also discussed. It is shown that the cycling performance of lithium metal and Li-S batteries can be greatly improved with the incorporation of garnet structured solid electrolyte.