Solid-Solid Interfaces in Solid-State Batteries

Solid-state batteries are considered to be a highly desirable energy storage system for various aerospace applications that require high safety, high performance, and extreme

environment adaptability. Different from the use of liquid electrolytes that can penetrate through the available pores in the battery cell, the electrochemistry using solid electrolytes

during battery reactions relies solely on solid-solid contacts. Therefore, the electrical and electrochemical pathways of all solid-solid interfaces among the various components in

the solid-state battery cell need to be sufficiently addressed. These interfaces typically include those within the composite cathode and the solid electrolyte layer, as well as the

contacting boundary between the solid electrolyte layer and the anode. In this presentation, we will discuss the fundamental challenges in each of these interfaces, and the methodologies that our team has developed to counter these issues will be presented.