콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Effect of the Quantity of Liquid Electrolyte on Self-Healing Electrostatic Shield Mechanism of CsPF6 Additive for Li Metal Anodes
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2019-07
- 저자명 유명현,윤별희,김석우,이용민
- 학술지명 ACS OMEGA
- 발행처명 AMER CHEMICAL SOC
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 4
- 논문 다운로드 링크(외부) https://doi.org/10.1021/acsomega.9b00928
- 연구분야 공학 > 화학공학
논문 초록 (Abstract)
We used a cesium hexafluorophosphate (CsPF6)-containing liquid electrolyte for surface-patterned Li metal anodes and confirmed that there is a synergistic improvement in the electrochemical performance such as cycle performance and rate capability. For instance, the surface-patterned Li metal maintains 91.4% of the initial discharge capacity after the 1000th cycle (C/2 = 0.8 mA cm(-2) for charging, 1C for discharging). When a large quantity of the CsPF6-containing liquid electrolyte (600 mu L) is used, the bare Li metal and surface-patterned Li metal are more effectively stabilized in comparison with the case where 80 mu L of electrolyte is used, resulting in improved electrochemical performance. Through systematic testing, we recognize that these results are because of the self-healing electrostatic shield mechanism, which is mainly dependent on the amount of Cs+ ions. A small amount of Cs+ ions cannot effectively counteract the incoming Li+ ions because they cannot form an effective electrostatic shield on the protrusions present on the Li metal surface.
