Electrolyte Composition and Secondary Battery Using the Same

• Main Authors: CHOI HAN YOUNG, KUM JOONGHAN, JEONG SEONG WOOK, BAEK SUNGHO
• Format: Patent
• Language: English; Korean
• Published: 22.01.2019
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention provides an electrolyte composition comprising a propane sultone compound in which carbon at a specific position is substituted with a specific substituent and a nonaqueous solvent, and a secondary battery comprising the electrolyte composition. The electrolyte composition according to the present invention can significantly increase lifetime characteristics of a secondary battery by forming a stable cathode coating film containing a propane sultone compound in which carbon at a specific position is substituted with a specific substituent group. 본 발명은 특정 위치의 탄소가 특정 치환기로 치환된 프로판 설톤 화합물 및 비수용매를 포함하는 전해액 조성물 및 상기 전해액 조성물을 포함하는 이차전지를 제공한다. 본 발명에 따른 전해액 조성물은 특정 위치의 탄소가 특정 치환기로 치환된 프로판 설톤 화합물을 포함하여 안정한 음극피막을 형성함으로써 이차전지의 수명특성을 현저히 증가시킬 수 있다.