用于锂二次电池之电解质溶液添加剂、非水性电解质溶液、及含该添加剂的锂二次电池;ELECTROLYTE SOLUTION ADDITIVE FOR LITHIUM SECONDARY BATTERY, AND NON-AQUEOUS ELECTROLYTE SOLUTION AND LITHIUM SECONDARY BATTERY INCLUDING THE ADDITIVE

摘要

本发明提供一种非水性电解质溶液，其包含非水性有机溶剂、醯亚胺基锂盐、与至少一种选自由下列所组成之组群的添加剂作为电解质溶液添加剂：二氟双草酸磷酸锂(LiDFOP)、磷酸(三甲矽烷基)丙酯(TMSPa)、1,3-丙烯磺酸内酯(PRS)、与硫酸伸乙酯(ESa)。;根据本发明之用于锂二次电池的电解质溶液添加剂，该电解质溶液添加剂可改良高低温输出特性及防止鼓胀现象，而抑制鼓胀现象系藉由抑制PF6 - 在阴极表面上分解(可能发生在含有电解质溶液添加剂之锂二次电池的高温循环期间)及防止电解质溶液之氧化反应。;According to the electrolyte solution additive for a lithium secondary battery of the present invention, the electrolyte solution additive may improve output characteristics at high and low temperatures and may prevent a swelling phenomenon by suppressing the decomposition of PF6 - on the surface of a cathode, which may occur during a high-temperature cycle of a lithium secondary battery including the electrolyte solution additive, and preventing an oxidation reaction of an electrolyte solution.