Non-aqueous electrolyte solution additive, and non-aqueous electrolyte solution for lithium secondary battery and lithium secondary battery which include the same
申请人:LG Chem, Ltd.
公开号:US11081729B2
公开(公告)日:2021-08-03
The present invention relates to a non-aqueous electrolyte solution additive, and a non-aqueous electrolyte solution for a lithium-ion battery and a lithium-ion battery which include the same, and particularly, to a non-aqueous electrolyte solution, which may remove an acid generated by the decomposition of a lithium salt while being able to suppress the dissolution of metal impurities causing failure in the battery by using and including a Lewis base compound containing a propargyl group as a non-aqueous electrolyte solution additive for a lithium-ion battery, and a lithium secondary battery in which transition metal dissolution in a positive electrode and a low-voltage phenomenon are improved.
本发明涉及一种非水电解质溶液添加剂,以及一种用于锂离子电池的非水电解质溶液和一种包含该添加剂的锂离子电池,特别是一种非水电解质溶液、通过使用和包括含有丙炔基团的路易斯碱化合物作为锂离子电池的非水电解质溶液添加剂,可去除锂盐分解产生的酸,同时能够抑制导致电池失效的金属杂质的溶解,以及改善正极中过渡金属溶解和低电压现象的锂二次电池。