콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Size effects of micro-pattern on lithium metal surface on the electrochemical performance of lithium metal secondary batteries
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2018-12
- 저자명 Joonam Park, Dohwan Kim, Dahee Jin, Charudatta Phatak, Kuk Young Cho, Young-Gi Lee, Seungbum Hong, 유명현, 이용민
- 학술지명 Journal of power sources
- 발행처명 Elsevier
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 9
- 논문 다운로드 링크(외부) https://doi.org/10.1016/j.jpowsour.2018.09.061
- 연구분야 공학 > 화학공학
논문 초록 (Abstract)
Two micro-patterns of different sizes (50 and 80 μm) are designed to have equivalent capacities of 1.06 and 2.44 mAh cm−2 by building a computational battery model. After preparing two stamps each possessing a micro-pattern design, the corresponding pattern is properly imprinted on the surface of 100 μm lithium metal, which is confirmed by scanning electron microscopy. When both micro-patterned lithium metals are electrochemically reduced and oxidized up to 1 mAh cm−2 in Li/Li symmetric cells at 1 or 2 mA cm−2, the 80 μm-patterned lithium shows a more stabilized lower overpotential during long-term cycling than the 50 μm-patterned and bare lithium, probably due to the lithium anchoring effect and a larger empty volume in the patterns. Additionally, an overflow of lithium deposits is easily observed in the 50 μm-patterned lithium metal, while the 80 μm-patterned lithium metal holds most of the lithium deposits within the patterns. When both micro-patterned lithium metals are assembled to full cells with a LiNi0·6Co0·2Mn0·2O2 cathode of 2 mAh cm−2, the 80 μm-patterned lithium metal shows much better electrochemical performances with stable plating/stripping behavior within the patterns.
