Stable artificial solid electrolyte interphase with lithium selenide and lithium chloride for dendrite-free lithium metal anodes
- Title
- Stable artificial solid electrolyte interphase with lithium selenide and lithium chloride for dendrite-free lithium metal anodes
- Author
- 백운규
- Keywords
- Artificial solid electrolyte interphase; Lithium chloride; Lithium dendrite; Lithium metal anodes; Lithium selenide
- Issue Date
- 2021-09
- Publisher
- Elsevier B.V.
- Citation
- Journal of Power Sources, v. 506, article no. 230158, Page. 1-10
- Abstract
- Li dendrite growth and corresponding parasitic reactions are inherent vulnerability of lithium metal anodes, limiting practical adoption. Here, we report a stable artificial solid electrolyte interphase (SEI) layer consisting of Li2Se and LiCl with high Li ion conducting and insulating properties fabricated through a facile and low-cost approach. The designed artificial SEI layer on Li blocks direct contact with the electrolyte and enables dendrite-free Li plating through the artificial SEI layer. With these benefits, Li anodes modified with an artificial SEI show dendrite-free Li plating behaviors with a lower porosity of 30% compared to that of bare Li (43%) at a high current density of 5.0 mA cm−2 and a high capacity of 40 mAh cm−2. In addition, modified anodes exhibit stable cyclability with lower overpotentials in Li symmetric cells operated at 1.0 mA cm−2 with 1.0 mAh cm−2 for 400 cycles. The significant improvement in cycling performance over hundreds of cycles is achieved using LiCoO2 and LiFePO4 cathodes. Furthermore, higher average Coulombic efficiency of 96.4% is realized in a full cell consisting of a high-capacity Ni0.8Co0.1Mn0.1O2 (3.5 mAh cm−2) and thin (50 μm) modified Li anodes compared to that of bare Li anodes (94.3%). © 2021 Elsevier B.V.
- URI
- https://www.sciencedirect.com/science/article/pii/S0378775321006820?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/178849
- ISSN
- 0378-7753;1873-2755
- DOI
- 10.1016/j.jpowsour.2021.230158
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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