Electrochemical Performance and Microstructure Evolution of a Quasi-Solid-State Lithium Battery Prepared by Spark Plasma Sintering

Abstract

Solid-state lithium batteries are promising nextgeneration energy storage systems for electric vehicles due to their high energy density and high safety and require achieving and maintaining intimate solid−solid interfaces for lithium-ion and electron transport. However, the solid−solid interfaces may evolve over cycling, disrupting the ion and electron diffusion pathways and leading to rapid performance degradation. The development of solidstate lithium batteries has been hindered by the lack of fundamental understanding of the interfacial microstructure change over cycling