콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Enhancing the cycling stability of sodium metal electrodes by building an inorganic–organic composite protective layer
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2017-02
- 저자명 Yun-Jung Kim, Hongkyung Lee, Hyungjun Noh, Jinhong Lee, Seokwoo Kim, Myung-Hyun Ryou, Yong Min Lee, Hee-Tak Kim
- 학술지명 ACS applied materials & interfaces
- 발행처명 American Chemical Society
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 8
- 논문 다운로드 링크(외부) https://doi.org/10.1021/acsami.6b14437
- 연구분야 공학 > 화학공학
논문 초록 (Abstract)
Owing to the natural abundance of sodium resources and their low price, next-generation batteries employing an Na metal anode, such as Na–O2 and Na–S systems, have attracted a great deal of interest. However, the poor reversibility of an Na metal electrode during repeated electrochemical plating and stripping is a major obstacle to realizing rechargeable sodium metal batteries. It mainly originates from Na dendrite formation and exhaustive electrolyte decomposition due to the high reactivity of Na metal. Herein, we report a free-standing composite protective layer (FCPL) for enhancing the reversibility of an Na metal electrode by mechanically suppressing Na dendritic growth and mitigating the electrolyte decomposition. A systematic variation of the liquid electrolyte uptake of FCPL verifies the existence of a critical shear modulus for suppressing Na dendrite growth, being in good agreement with a linear elastic theory, and emphasizes the importance of the ionic conductivity of FCPL for attaining uniform Na plating and stripping. The Na–Na symmetric cell with an optimized FCPL exhibits a cycle life two times longer than that of a bare Na electrode.
