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Size effects of micro-pattern on lithium metal surface on the electrochemical performance of lithium metal secondary batteries
- Size effects of micro-pattern on lithium metal surface on the electrochemical performance of lithium metal secondary batteries
- Park, Joonam; Kim, Dohwhan; Jin, Dahee; Phatak, Charudatta; Cho, Kuk Young; Lee, Young-Gi; Hong, Seungbum; Ryou, Myung-Hyun; Lee, Yong Min
- DGIST Authors
- Lee, Yong Min
- Issue Date
- Journal of Power Sources, 408(31), 136-142
- Article Type
- Article; Proceedings Paper
- Author Keywords
- Lithium metal; Micro-pattern; Modeling; Plating and stripping; Secondary battery
- SULFUR BATTERIES; ION BATTERIES
- 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. © 2018 Elsevier B.V.
- Elsevier BV
- Related Researcher
Lee, Yong Min
Battery Materials & Systems LAB
Battery; Electrode; Electrolyte; Separator; Simulation
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- Department of Energy Science and EngineeringBattery Materials & Systems LAB1. Journal Articles
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