NON-AQUEOUS ELECTROLYTIC SOLUTION AND LITHIUM SECONDARY BATTERY COMPRISING SAME

• Main Authors: CHUNG, Se Young, YOON, Jeong Ae, LEE, Won Kyun, NOH, Chan Woo, KIM, Kyoung Hoon, OH, Mi Yeon, KIM, Ki Cheol, KIM, Jae Yoon, SHIN, Sung Ho
• Format: Patent
• Language: English; French; Korean
• Published: 01.02.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention relates to a non-aqueous electrolytic solution and a lithium secondary battery comprising same, the non-aqueous electrolytic solution being capable of improving high-temperature stability and lifespan characteristics of lithium secondary batteries by forming a thin and stable SEI layer, wherein the non-aqueous electrolytic solution comprises: an organic solvent; a lithium salt; a compound represented by chemical formula I described in the specification; and at least one selected from compounds represented by chemical formulas II to V described in the specification. La présente invention concerne une solution électrolytique non aqueuse et une batterie secondaire au lithium la comprenant, la solution électrolytique non aqueuse étant capable d'améliorer la stabilité à haute température et les caractéristiques de durée de vie de batteries secondaires au lithium par formation d'une couche SEI mince et stable, la solution électrolytique non aqueuse comprenant : un solvant organique ; un sel de lithium ; un composé représenté par la formule chimique I décrite dans la description ; et au moins un composé choisi parmi les composés représentés par les formules chimiques II à V décrites dans la description. 본 발명은 얇고 안정한 SEI 층을 형성하여 리튬 이차전지의 고온 안정성 및 수명 특성을 향상시킬 수 있는 비수 전해액에 관한 발명으로, 유기 용매; 리튬염; 본 명세서에 기재된 화학식 I로 표시되는 화합물; 및 본 명세서에 기재된 화학식 II 내지 화학식 V로 표시되는 화합물 중에서 선택되는 1종 이상;을 포함하는 비수 전해액 및 이를 포함하는 리튬 이차전지에 관한 것이다.