ELECTROLYTE FOR LITHIUM-SULFUR SECONDARY BATTERY AND LITHIUM-SULFUR SECONDARY BATTERY COMPRISING THE SAME

• Main Authors: PARK SEONG HYO, KWACK HOBEOM, HAN SEHUI, CHA SUNYOUNG, LEE JAEWAN, YOO SOLJI, JANG EUNJI, LEE CHANGHOON, JEON HYELIM, HAN KYEONG HWAN, PARK CHANGYOUNG, LEE BORAM
• Format: Patent
• Language: English; Korean
• Published: 05.03.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

본 발명은 리튬-황 이차전지의 출력 특성을 향상시킬 수 있는 리튬-황 이차전지용 전해질 및 이를 포함하는 리튬-황 이차전지에 관한 것이다. 상기 리튬-황 이차전지용 전해질은 리튬염, 비수계 용매 및 첨가제를 포함하고, 전해질과 디리티오 퍼옥타설파이드 (dilithio peroctasulfide; Li2S8)의 제 1 혼합 에너지(Gmix1) 및 전해질과 리튬 설파이드 (lithium sulfide; Li2S)의 제 2 혼합 에너지(Gmix2)가 각각 일정 범위를 갖는 것이다. The present invention relates to an electrolyte for lithium-sulfur secondary batteries that can improve the output characteristics of the lithium-sulfur secondary batteries, and to a lithium-sulfur secondary battery containing same. The electrolyte for lithium-sulfur secondary batteries includes a lithium salt, a non-aqueous solvent, and an additive, and respective certain ranges for the first mixture energy (Gmix1) of the electrolyte with dilithio peroctasulfide (Li2S8) and the second mixture energy (Gmix2) of the electrolyte with lithium sulfide (Li2S).