LITHIUM SECONDARY BATTERY

• Main Authors: OH, Jeong Woo, KIM, Hyun Seung, LEE, Chul Haeng, HWANG, Seung Hae
• Format: Patent
• Language: English; French; Korean
• Published: 10.03.2022
• 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 lithium secondary battery comprising: a cathode containing a cathode active material; an anode containing an anode active material; a separator interposed between the cathode and the anode; and a non-aqueous electrolyte, wherein the non-aqueous electrolyte contains: a lithium salt including LiPF6 and LiN(FSO2)2; an additive including a sultone-based compound; and an organic solvent including a non-fluorine-based linear carbonate solvent and a fluorine-based cyclic carbonate solvent, and wherein the anode active material is formed of a silicon-based material. La présente invention concerne une batterie secondaire au lithium comprenant : une cathode contenant un matériau actif de cathode ; une anode contenant un matériau actif d'anode ; un séparateur interposé entre la cathode et l'anode ; et un électrolyte non aqueux, l'électrolyte non aqueux contenant : un sel de lithium comprenant LiPF6 et LiN(FSO2)2 ; un additif comprenant un composé à base de sultone ; et un solvant organique comprenant un solvant carbonate linéaire non fluoré et un solvant carbonate cyclique à base de fluor, et le matériau actif d'anode étant constitué d'un matériau à base de silicium. 양극 활물질을 포함하는 양극; 음극 활물질을 포함하는 음극; 상기 양극 및 음극 사이에 개재되는 분리막; 및 비수 전해액을 포함하며, 상기 비수 전해액은 LiPF6 및 LiN(FSO2)2를 포함하는 리튬염; 설톤계 화합물을 포함하는 첨가제; 및 비불소계 선형 카보네이트 용매 및 불소계 환형 카보네이트 용매를 포함하는 유기용매를 포함하고, 상기 음극 활물질은 실리콘계 물질로 이루어진 것인 리튬 이차 전지에 관한 것이다.