| 학회 | 한국공업화학회 |
| 학술대회 | 2022년 봄 (05/11 ~ 05/13, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 | 26권 1호 |
| 발표분야 | 포스터-전기화학 |
| 제목 | Elucidating underlying mechanism of DME-based LHCE with functional additive for high voltage LiCoO2 cathode and Li metal anode |
| 초록 | Advanced electrolyte system of localized highly concentrate electrolyte (LHCE) for lithium metal batteries attracted much attention of researchers due to their high oxidative stability, low viscosity, and low cost. Herein, we propose a novel DME-based LHCE system with functional additive in 4.4V LiCoO2|Li cell at 0.5C rate. A novel DME-based LHCE can suppress generation of reactive oxygen at LiCoO2 cathode by trapping the electron-rich part of reactive oxygen with electron-deficient part of functional additive. Furthermore, a novel DME-based LHCE with additive can reduce the side reaction between electrolyte and lithium metal by forming LiF-rich SEI layer on lithium metal. As a result, cycle performance of DME-based LHCE improve from 146 cycles to 171cycles with capacity retention ≈ 80%, 0.5C current density by stabilizing the interface of lithium metal and LiCoO2 cathode. |
| 저자 | 이정아, 김세훈, 최남순 |
| 소속 | KAIST |
| 키워드 | lithium metal; LiCoO2; electrolyte; localized highly concentrated electrolyte |
