申请人:Contemporary Amperex Technology Co., Limited
公开号:EP3367491A1
公开(公告)日:2018-08-29
The present invention provides a lithium ion battery and an electrolyte thereof. The electrolyte for the lithium ion battery includes a non-aqueous organic solvent, a lithium salt and additives, wherein the additives include additive A cyclophosphazene compound, additive B lithium fluorophosphate compound, and additive C selected from at least one of silane phosphate compound, silane phosphite compound and silane borate compound. Compared with conventional technologies, the nickel-rich positive electrode lithium ion battery using the electrolyte of the present invention has a desirable cyclic capacity retention rate, a desirable storage capacity retention rate and a low gas production at high temperature, and has a low DC internal resistance at low temperature, which can remarkably improve the thermal stability of lithium ion battery.
本发明提供了一种锂离子电池及其电解液。锂离子电池的电解液包括非水有机溶剂、锂盐和添加剂,其中添加剂包括添加剂 A 环磷氮化合物、添加剂 B 氟磷酸锂化合物和选自硅烷磷酸盐化合物、硅烷亚磷酸酯化合物和硅烷硼酸盐化合物中至少一种的添加剂 C。与传统技术相比,采用本发明电解液的富镍正极锂离子电池具有理想的循环容量保持率、理想的储能容量保持率和高温产气量低,低温直流内阻低,可显著提高锂离子电池的热稳定性。