CEI and SEI Formation in Li-Ion Batteries

In the broader context of global efforts toward carbon neutrality, there is a growing imperative for high-energy battery technologies. This chapter offers a historical and technical exploration of the solid-electrolyte-interphase (SEI) and cathode-electrolyte-interphase (CEI) in lithium-ion batteries, crucial components for enhancing battery performance and longevity. Starting with electrolyte design strategies for regulating interfacial reactions. Followed by revisiting the SEI and CEI concept’s inception and their evolution, respectively. This chapter encompasses an in-depth analysis of SEI and CEI composition and formation, enriched by the latest advancements in characterization and modeling. Addressing the challenge of stability in high-capacity anodes and high-voltage cathodes, it highlights strategies for forming inorganic-rich interphases, pivotal in advancing lithium-ion battery technology.