ELECTROLYTE FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY

• Main Authors: YOU DUCKJAE, LEE HARIM, CHO WONSEOK, SHATUNOV PAVEL, SHIN JEONGMIN, TSAY OLGA, KANG YOUNGHYE, CHOI HYUNBONG, LEE TAE JIN, LIM JIN HYEOK, WOO MYUNGHEUI, PARK HYEJIN, KIM AERAN
• Format: Patent
• Language: English; Korean
• Published: 25.01.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention according to an embodiment relates to an electrolyte for lithium secondary battery, comprising: a non-aqueous organic solvent; lithium salt; and an additive, wherein the additive comprises at least one of (A) a compound represented by chemical formula 1, (B) a cyclic carbonate-based compound, and (C) an amphoteric lithium salt compound. The present invention also relates to a lithium secondary battery comprising the electrolyte. The electrolyte for a lithium secondary battery has improved initial resistance, resistance increase rate, and gas generation amount of the battery. 일 구현예는 비수성 유기 용매; 리튬염; 및 첨가제를 포함하고, 상기 첨가제는 (A) 화학식 1로 표현되는 화합물, 및 (B) 환형 카보네이트계 화합물 및 (C) 양쪽성 리튬염 화합물 중 적어도 하나를 포함하는, 리튬 이차 전지용 전해액 및 이를 포함하는 리튬 이차 전지를 제공한다.