| 학회 | 한국공업화학회 |
| 학술대회 | 2022년 봄 (05/11 ~ 05/13, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 | 26권 1호 |
| 발표분야 | 포스터-에너지저장·변환 |
| 제목 | Ni-rich layered oxide cathodes using mixed catholytes of sulfide and halide for all-solid-state batteries |
| 초록 | All-solid-state lithium-ionbatteries (ASLBs) are considered as next generation batteries owing to theirpotential of improved safety and energy density, compared to conventionalliquid electrolyte-based lithium-ion batteries. Sulfide solid electrolytes(SEs) with Ni-rich layered metal oxides (LiMO2, M = Ni, Co, Al, Mn)suffer from serious electrochemical degradation originating from their poor electrochemicaloxidation stability (>3 V vs. Li/Li+) that offsets the highLi+ conductivity and mechanical deformability. Furthermore, an instabilityof Ni4+ of LiMO2 causes high interfacial resistances by thephase transition on the LiMO2 surfaces. To overcome these limitations,newly emerging halide SEs, despite their lower Li+ conductivity,have attracted attention due to their excellent oxidation stability (> 4 V vs.Li/Li+). In this work, we propose a hybrid use of sulfide and halide SEs tosuppress their drawbacks for the application to LiMO2. |
| 저자 | 김종석, 정윤석 |
| 소속 | 연세대 |
| 키워드 | All-solid-state batteries; sulfide solid electrolyte; halide solid electrolyte; Ni-rich layered metal oxide |
