共价有机框架材料应用于锂硫电池的进展

金属锂负极枝晶不可控生长、隔膜界面兼容性差及正极中存在的穿梭效应等,导致锂硫电池的容量衰减、安全性能下降。共价有机框架(COFs)材料具有密度低、比表面积大、孔径和结构可调、易于功能化和共价结构组合多等优点,具有应用于锂硫电池关键材料的潜力。总结近五年COFs在锂硫电池中的应用进展,包括COFs在锂硫电池正极框架材料、固体电解质相界面(SEI)膜的构建和固态电解质中的应用。对COFs的设计方向进行总结和展望,以期对锂硫电池未来发展方向提供更好的借鉴。

Progress in covalent organic framework materials applied in lithium sulfur battery

The uncontrolled dendrites growth of lithium metal anode,poor compatibility of membrane interface and shuttle effect in cathode,which led to the capacity attenuation and safety performance degradation of lithium sulfur battery.Covalent organic frame-works(COFs)materials had the advantages of low density,large specific surface area,adjustable pore size and structure,easy functionalization and multiple covalent structure combinations,which was proved to have the potential to be used as key materials for lithium sulfur battery.The application progress in COFs in lithium sulfur battery in recent five years was summarized,including the applications of COFs as cathode framework materials,the construction of SEI membrane and solid electrolyte in lithium sulfur battery.The design direction of COFs was summarized and prospected in order to provide better reference for the future development of lithium sulfur battery.