Research Progress of Thin Film Structures of All-Solid-State Lithium-Ion Battery

The need for portable power sources has increased quickly with the advent of the electronic information era. Due to the significant benefits of lithium-ion batteries' high voltage, high capacity, and extended cycle life, these batteries have a wide range of potential applications in a variety of industries, including portable electronic gadgets, electric vehicles, and space technology. Lithium-ion batteries may cause safety issues such as thermal runaway under harsh conditions. By employing solid electrolytes in the thin layer of all-solid-state lithium batteries (TFLIBs) instead of organic liquid electrolytes, the safety issues with current commercial lithium-ion batteries may be effectively remedied. They outperform bulk solid-state lithium batteries, which has made the industry pay close attention to them. Because they directly affect the charge-discharge rate, cycle life, self-discharge, safety, and high and low-temperature performance of thin film batteries, electrolyte thin films play a crucial role in TFLIBs. This paper reviews three innovative thin film structures, their different benefits and drawbacks, the most current research on them, and projections for their future development to serve as a reference for future research on lithium-ion batteries.