BINDER FOR LITHIUM-SULFUR BATTERY, POSITIVE ELECTRODE COMPRISING SAME, AND LITHIUM-SULFUR BATTERY

• Main Authors: LEE, Hyunsoo, KIM, Yu Mi, PARK, Gi Su, YANG, Doo Kyung, JUNG, Jong Mo, LEE, Seong Ho, JUNG, Byounghyo
• Format: Patent
• Language: English; French; Korean
• Published: 04.07.2019
• 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 binder for a lithium-sulfur battery, a positive electrode comprising the same, and a lithium-sulfur battery and, more specifically, to a binder for a lithium-sulfur battery, the binder containing polyacrylic acid lithium and polyvinyl alcohol. The binder for a lithium-sulfur battery contains two kinds of particular polymers, and thus improves electrochemical characteristics and stability of the positive electrode, thereby improving capacity and lifespan characteristics of the lithium-sulfur battery. La présente invention concerne un liant pour une batterie lithium-soufre, une électrode positive le comprenant, et une batterie lithium-soufre, et plus précisément un liant pour une batterie lithium-soufre, le liant contenant un acide polyacrylique, du lithium et un alcool polyvinylique. Le liant pour une batterie lithium-soufre contient deux types de polymères particuliers, et améliore ainsi les caractéristiques électrochimiques et la stabilité de l'électrode positive, améliorant de ce fait les caractéristiques de capacité et de durée de vie de la batterie lithium-soufre. 본 발명은 리튬-황 전지용 바인더, 이를 포함하는 양극 및 리튬-황 전지에 관한 것으로, 보다 상세하게는 폴리아크릴산리튬 및 폴리비닐알코올을 포함하는 리튬-황 전지용 바인더에 관한 것이다. 상기 리튬-황 전지용 바인더는 2종의 특정 고분자를 포함함에 따라 양극의 전기화학적 특성 및 안정성을 향상시킴으로써 리튬-황 전지의 용량 및 수명 특성을 향상시킬 수 있다.