氟化无机材料在金属锂负极中的应用

Fluorinated Inorganic Materials for Lithium Metal Anodes—A Short Review

金属锂被认为是高能量密度电池材料的“圣杯”,具有超高的理论容量和最低的氧化还原电位。但由于锂枝晶不可控生长、固体电解质界面膜(SEI膜)不稳定以及“死锂”累积等系列问题,限制了其商业化应用。氟化材料能有效稳定金属锂/电解液界面,均匀锂离子通量和抑制锂枝晶生长,是金属锂二次电池领域的研究重点。本文综述了近年来氟化无机材料在金属锂沉积骨架、人工SEI保护层、电解液添加剂以及固态电解质等方面的研究进展,阐述了氟化无机材料稳定金属锂负极循环的内在机理,并展望了其未来的发展前景。

Lithium(Li)metal is considered as the"Holy Grail"anode material for next-generation high-energy density battery system due to its high theoretical capacity and lowest reduction potential.However,the practical application of Li metal anodes(LMAs)is still impeded due to its intrinsic issues,including the uncontrolled Li dendrites growth,unstable solid-electrolyte interface(SEI),and the accumulation of“dead Li”.The fluorinated materials can stabilize the Li/electrolyte interface,lead to the uniform Li flux and suppress the growth of Li dendrites,thus becoming one of the research hotspots for LMAs.This review summarized recent progress of the fluorinated inorganic materials on constructing Li metal plated skeletons,developing artificial SEI film,introducing electrolyte additives and employing solid-state electrolytes.The rational design and mechanism of these reported fluorinated inorganic materials for stabilizing LMAs were represented.In addition,we also prospected the future research aspects.