| 학회 | 한국공업화학회 |
| 학술대회 | 2015년 봄 (04/29 ~ 05/01, BEXCO (부산)) |
| 권호 | 19권 1호 |
| 발표분야 | (나노) Nano-Materials for Next-generation Energy Storage System |
| 제목 | Functional additives and their roles in lithium-ion batteries |
| 초록 | Lithium-ion batteries (LIBs) are one of the most promising energy storage devices because of their high power and energy densities, current technical maturity, and economic considerations. Conventional carbonate solvents such as ethylene carbonate (EC) have been widely used as solvents because of their high dissociation ability, reasonably high ionic conductivity, and ability to form a proper solid electrolyte interphase (SEI) layer on the carbonaceous anode. However, conventional carbonate-solvent-based electrolytes do not make a robust SEI on the anode, especially metal-based anodes and exhibit inferior anodic stability of lower than 4.3 V vs. Li/Li+, which makes them highly unstable against high-voltage cathodes. The formation of highly stable surface films by the use of reducible and oxidizable additives in the electrolytes has been considered to be one of the most effective strategies for stabilizing the electrode–electrolyte interface. In this presentation, underlying mechanisms of the fluoroethylene carbonate (FEC) solvent, which is widely used for high-capacity metal-based anodes such as silicon, are discussed. In addition, we introduce promising ways to stabilize the high-voltage cathode-electrolyte interface. It is obvious that the development of functional electrolyte additives is an immediate technological solution for high performance LIBs. |
| 저자 | 최남순 |
| 소속 | UNIST |
| 키워드 | Electrolytes; Additives; Solid electrolyte interphase |
