新型锂盐二氟草酸硼酸锂的研究进展

Research Progress of New Lithium Salt Lithium Difluorooxalate Borate

二氟草酸硼酸锂(LiODFB)是一种新型锂盐,作为电解质时在宽温域下具有良好的离子电导率。另外,该电解质可在正极集流体铝箔表面形成一层致密的钝化膜,并能在电解液-电极界面上形成稳定而致密的固体电解质相界面(SEI)。使用LiODFB电解质可有效提高电池在宽温域下的循环性能和倍率性能,是一种发展潜力很大的新型锂盐电解质。本文介绍了LiODFB的结构、表征方法以及基本特性,综述了其制备方法与锂基电池中的应用,展望了LiODFB在未来可能的应用以及研究方向。

Lithium difluorooxalate borate(LiODFB)is a novel lithium salt with good ionic conductivity over a wide temperature range.In addition,the electrolyte can form a dense passivation film on the surface of the positive current collector aluminum foil,and can form a stable and dense solid electrolyte interface(SEI)on the electrolyte-electrode interface.The use of LiODFB electrolyte can effectively improve the cycle performance and rate performance of batteries in a wide temperature range,and is a new type of lithium salt electrolyte with great development potential.In this paper,the structure,characterization methods and basic properties of LiODFB are introduced,and its preparation methods and applications in different lithium-based batteries are reviewed,the possible applications and research directions of LiODFB in the future are also prospected.