POLYMER SOLID ELECTROLYTE WITH EXCELLENT HIGH VOLTAGE STABILITY AND ITS MANUFACTURING METHOD

• Main Authors: KIM DONG HA, JEON MYUNG SEOK, PARK SE KOOK, JANG SANG SOON, SHIN KYOUNG HEE, YEON SUN HWA, JIN CHANG SOO, HWANG SEUNG HAE
• Format: Patent
• Language: English; Korean
• Published: 21.10.2022
• 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 polymer solid electrolyte with excellent electrical stability at high voltage and a lithium secondary battery including the same. A polymer electrolyte composite material of the present invention includes an oligomer synthesized from phosphoryl chloride as an ion conductor, so that electrical stability is improved in a high voltage region, and thus the capacity and lifespan characteristics of a lithium ion all-solid-state battery can be improved. 본 발명은 고전압에서 전기적 안정성이 우수한 고분자 고체전해질 및 이를 포함하는 리튬이차전지에 관한 것으로서, 본 발명의 고분자 전해질 복합재료는 이온전도체로서 염화포스포릴에서 합성된 올리고머를 포함함으로써, 고전압 영역에서 전기적 안정성이 향상되어 리튬이온 전고체 전지의 용량 및 수명특성을 향상시킬 수 있다.