Solid-State Batteries: An Introduction

Abstract

The development of next-generation batteries has mainly transitioned to a concept of the solid-state battery (SSB) because of its great potential for safe and high energy density energy storage. This chapter aims to provide a brief introduction of this promising technology. We first discuss its working principle by highlighting the major difference between an SSB and a liquid-electrolyte based battery. We then introduce the potential advantages of SSBs, including high safety, high energy density, high power density, and a long cycle life. We also provide a chronological overview of the development of a variety of solid electrolytes, which are the key components of SSBs. We would like to emphasize that SSBs are not a new concept. The development of SSBs was far earlier than that of commercialized lithium-ion batteries. We conclude this chapter by discussing the remaining challenges for future development of this technology.