Non-aqueous electrolyte solution and lithium secondary battery comprising same

• Main Authors: LEE MIN-YOUNG, LEE, BUMJIN
• Format: Patent
• Language: Chinese; English
• Published: 17.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Embodiments of the present invention provide a non-aqueous electrolyte solution and a lithium secondary battery including the same. The non-aqueous electrolyte solution includes a non-aqueous organic solvent, a lithium salt, an additive including a first additive including a phosphorus-fluorine compound, and an auxiliary additive including a carbonate compound, the content of the first additive being 30 wt% to 120 wt% with respect to the weight of the carbonate compound. And the capacity characteristic of the secondary battery at low temperature and the storage characteristic at high temperature can be improved. 本发明的实施例提供非水电解液及包含其的锂二次电池。所述非水电解液包含非水系有机溶剂、锂盐、包括含磷-氟系化合物的第一添加剂的添加剂及含碳酸盐系化合物的辅助添加剂，相对于碳酸盐系化合物的重量的第一添加剂的含量是30重量％至120重量％。能够改善二次电池在低温的容量特性及在高温的储存特性。