콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Chemical aspect of oxygen dissolved in a dimethyl sulfoxide-based electrolyte on lithium metal
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2014-03
- 저자명 Hongkyung Lee, Dong Jin Lee, Je-Nam Lee, Jongchan Song, Yunju Lee, Myung-Hyun Ryou, Jung-Ki Park, Yong Min Lee
- 학술지명 Electrochimica Acta
- 발행처명 Pergamon
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 8
- 논문 다운로드 링크(외부) https://doi.org/10.1016/j.electacta.2014.01.042
- 연구분야 공학 > 화학공학
논문 초록 (Abstract)
The chemical stability of Li metal in a rechargeable Li–O2 cell was examined by investigating the physicochemical changes that occurred during storage of Li in an electrolyte comprising dimethyl sulfoxide (DMSO) with dissolved O2. During prolonged storage of Li in the oxygenated electrolyte, the Li surface became moss-like and its interfacial resistance increased. Analyses of reaction products using XPS and FT-IR revealed that the bis(trifluoromethyl sulfonyl) imide (TFSI) anions and DMSO solvent could have decomposed significantly through a further reaction path induced by O2. Furthermore, the formation of an unstable solid-electrolyte interphase by O2 causes degradation of the Li metal and deterioration of the electrolyte. This investigation shows that the Li anode should be protected from O2 by modification of Li and the separator to ensure long-term stability of the Li–O2 cell.
