LITHIUM SECONDARY BATTERY AND MANUFACTURING METHOD THEREFOR

• Main Authors: KANG, Sungjoong, KIM, Hyosik, JUNG, Hyeri, KIM, Minkyung, JUN, Youngjin, YOON, Jong Keon, SOON, Jiyong, KIM, Dong Kyu
• Format: Patent
• Language: English; French; Korean
• Published: 14.12.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

In order to increase the stability of a lithium secondary battery while maintaining the overall performance thereof, the present invention provides a lithium secondary battery comprising: an electrode assembly comprising electrodes and porous coating layers formed thereon; and a flame-retardant electrolyte comprising a lithium salt and a flame-retardant solvent defined by a predetermined inflammation point, wherein the porous coating layers contain ceramic particles or polymer particles having an absolute value of zeta potential of 25 mV or more. Afin d'augmenter la stabilité d'un accumulateur au lithium tout en maintenant ses performances globales, la présente invention concerne un accumulateur au lithium comprenant : un ensemble d'électrodes comprenant des électrodes et des couches de revêtement poreuses formées sur celui-ci ; et un électrolyte ignifuge comprenant un sel de lithium et un solvant ignifuge défini par un point d'inflammation prédéterminé, les couches de revêtement poreuses contenant des particules de céramique ou des particules de polymère ayant une valeur absolue de potentiel zêta de 25 mV ou plus. 본 발명은 리튬 이차 전지의 제반 성능을 유지하면서도 안정성을 높이기 위하여, 전극 및 상기 전극 상에 형성된 다공성 코팅층을 포함하는 전극 조립체; 및 소정의 인화점으로 정의되는 난연성 용매 및 리튬염을 포함하는 난연성 전해질을 포함하는 리튬 이차 전지로서, 상기 다공성 코팅층은 제타 전위(zeta potential)의 절대값이 25 mV 이상인 고분자 입자 또는 세라믹 입자를 포함하는 리튬 이차 전지를 제공한다.