Abstract

Li-ion batteries are widely used in electronic products, such as electric vehicles, mobile phones, computers. The electrolytes currently used in batteries are mostly organic liquids, which are less safe. In order to fundamentally improve the safety of batteries, the use of solid electrolytes instead of the once organic liquid electrolytes is gradually becoming a major trend. The ultimate goal is to improve the battery in terms of large capacity and extended service life and then push forward the normalization of all-solid-state Li-ion batteries in an all-around way. The current priority is to develop key battery materials and optimize battery performance. Starting from the key materials of all-solid-state Li-ion batteries, this paper reviews the various types of solid electrolytes, investigates the performance characteristics of positive and negative electrodes, the optimization methods of interfaces, and discusses the challenges ahead for further technology improvement.