摘要
Abstract
Solid-state lithium metal batteries(SSLMBs)have emerged as a pivotal direction for developing next-generation secondary batteries,attributed to their high theoretical energy density and safety features.However,the decline in ionic conductivity of the solid electrolyte at low temperatures,coupled with increased impedance at the electrolyte/electrode interface(≤0℃),severely impairs the electrochemical performance of these batteries.This limitation hinders their application in military and civilian sectors.Addressing the low-temperature electrochemical performance is thus a critical technological challenge.This study concentrates on the advanced and emerging technologies in solid-state electrolytes,reviewing progress in the domain of low-temperature SSLMBs from a materials perspective.Initially,the low-temperature chemical characteristics and failure mechanisms of SSLMBs are analyzed,encompassing bulk ion transport,interface charge transfer,electrode surface structure,and lithium metal stability.Subsequently,we summarize the design technologies for advanced lithium-ion batteries operational at low temperatures according to different types of solid electrolytes.The design principles,the relationship between chemical composition and performance,and the interface optimization strategies for inorganic,polymer,and composite solid-state electrolytes are elaborated in detail.Lastly,we prospect future practical research directions for SSLMBs at low temperatures across four dimensions:new materials,new characterization techniques,new mechanisms,and new standards.This review aims to provide a comprehensive reference for the rational design of SSLMBs under low-temperature conditions.关键词
固态电解质/锂金属电池/低温/离子电导率Key words
solid state electrolytes/lithium metal batteries/low temperature/ionic conductivity分类
信息技术与安全科学
