MATERIALS AND INTERFACIAL ENGINEERING FOR HIGH- PERFORMANCE ALL-SOLID-STATE BATTERIES

Abstract

Developing advanced energy storage systems may address the increasing concerns of energy shortage and environmental issues. Among many energy storage technologies, electrochemical energy storage systems such as lithium-ion batteries have been widely used in various applications. However, current lithium-ion batteries using flammable liquid electrolytes may cause a safety risk. All-solid-state sodium batteries (ASSSBs) have been attracting considerable attention as safe and low-cost alternatives to Li-ion batteries. However, the performance of ASSSBs falls short of the requirements for commercial applications mainly due to the challenges at the electrode-solid electrolyte interface. The goal of this dissertation is to develop new materials and interfacial engineering methods for high-performance ASSSBs with favorable electrode-electrolyte interfaces. In this dissertation, I demonstrate three effective strategies to address the interfacial challenges, namely through the use of organic cathode materials, new solid electrolyte development, and interfacial engineering.