Developments and Challenges in Lithium-ion Solid-State Batteries

Abstract

Under the huge consumption of global fossil energy and the high environmental protection requirements faced by our country, the energy system is gradually developing in the direction of electrification, and the more mature Lithium-ion Batteries (LIBs) have been favored by the majority of users, and have been used in wearable devices, electric vehicles, and even various types of energy storage devices. However, the liquid electrolyte used in Li ion batteries is prone to combustion and risk of leakage. Therefore, solid-state electrolytes (SSEs) have been attempted as an alternative to solve the above challenges. At present, the mainstream solid-state electrolyte materials mainly include: oxides, polymers, halides, sulfides, etc. This paper organizes and categorizes the solid electrolytes, compares the ionic conductivity, interfacial compatibility, mechanical strength, preparation process and other factors; summarizes the latest advances in the optimization of the design of SSE materials, the interfacial regulation strategy, and the large-scale preparation process of SSE, and analyzes the problems faced by the current technology development and looks forward to the future development of SSE. It also analyzes the problems faced by the current technology development and looks forward to the future development trend.