Recent Progress in Solid-State Lithium Batteries Through Cathode Microstructure Engineering

Authors

Abstract

A high-performance cathode is necessary to realize the great potentials of solid-state batteries such as high energy density and long cycle life. It is also needed to validate electrolyte performance, which is lacking. Currently, cathodes for solid-state batteries are thinner and have lower cathode active material content than their lithium-ion battery counterpart, resulting from insufficient conductivity and limiting the battery energy density. This review provides an overview of recent development in cathode microstructure including advanced characterization, compatibility between cathodes and electrolyte, cathode architecture design, interface engineering, and correlating materials properties with cathode processing. Some perspectives on future development are shared including utilizing in-situ and operando characterization tools to better understand dynamic evolution in cathode/electrolyte interface, adapting artificial intelligence and machine learning to design and optimize cathode structures. This review aims to promote research interest on cathode development and advance solid-state battery technologies.