RECHARGEABLE LITHIUM BATTERY

• Main Authors: KANG SEOK MUN, KIM JONGSOON, YOON JAESANG, LEE YONGSEOK, JUN DO WOOK, KONG YOUNGSUN, SEONG WONMO, NAOYUKI HASE
• Format: Patent
• Language: English; Korean
• Published: 23.05.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

비수성 유기 용매, 리튬염 및 첨가제를 포함하는 전해액; 양극 활물질을 포함하는 양극; 및 음극 활물질을 포함하는 음극을 포함하고, 상기 첨가제는 하기 화학식 1A로 표시되는 화합물 및 하기 화학식 1B로 표시되는 화합물 중 적어도 1종을 포함하고, 상기 양극 활물질은 하기 화학식 2로 표시되는 리튬 니켈망간계 산화물을 포함하며, 충전 상한 전압은 4.4 V 내지 4.7 V인, 리튬 이차 전지를 제공한다. 상기 화학식 1A 및 화학식 1B는 명세서에 정의한 바와 같다. Provided is a rechargeable lithium battery including an electrolyte solution including a non-aqueous organic solvent, a lithium salt, and an additive; a positive electrode including a positive electrode active material; and a negative electrode including a negative electrode active material, wherein the additive includes one or more of a compound represented by Chemical Formula 1A and a compound represented by Chemical Formula 1B, the positive electrode active material includes a lithium nickel manganese-based oxide represented by Chemical Formula 2, and a charging upper limit voltage of the rechargeable lithium battery is about 4.4 V to about 4.7 V.Chemical Formula 1A and Chemical Formula 1B are as defined in the specification.