Epitaxial Growth of Nanostructured Li2Se on Lithium Metal for All Solid-State Batteries
- Title
- Epitaxial Growth of Nanostructured Li2Se on Lithium Metal for All Solid-State Batteries
- Author
- 백운규
- Keywords
- all solid-state batteries; lithium metal; lithium selenide; protective layer; sulfide-based electrolyte
- Issue Date
- 2021-06
- Publisher
- WILEY
- Citation
- ADVANCED SCIENCE, v. 8, NO. 11, article no. 2004204
- Abstract
- Lithium is considered to be the ultimate anode material for high energy-density rechargeable batteries. Recent emerging technologies of all solid-state batteries based on sulfide-based electrolytes raise hope for the practical use of lithium, as it is likely to suppress lithium dendrite growth. However, such devices suffer from undesirable side reactions and a degradation of electrochemical performance. In this work, nanostructured Li2Se epitaxially grown on Li metal by chemical vapor deposition are investigated as a protective layer. By adjusting reaction time and cooling rate, a morphology of as-prepared Li2Se is controlled, resulting in nanoparticles, nanorods, or nanowalls with a dominant (220) plane parallel to the (110) plane of the Li metal substrate. Uniaxial pressing the layers under a pressure of 50 MPa for a cell preparation transforms more compact and denser. Dual compatibility of the Li2Se layers with strong chemical bonds to Li metal and uniform physical contact to a Li(6)PS(5)Csulfide electrolyte prevents undesirable side reactions and enables a homogeneous charge transfer at the interface upon cycling. As a result, a full cell coupled with a LiCoO2-based cathode shows significantly enhanced electrochemical performance and demonstrates the practical use of Li anodes with Li2Se layers for all solid-state battery applications.
- URI
- https://onlinelibrary.wiley.com/doi/10.1002/advs.202004204https://repository.hanyang.ac.kr/handle/20.500.11754/178851
- ISSN
- 2198-3844;2198-3844
- DOI
- 10.1002/advs.202004204
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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- Epitaxial Growth of Nanostructured Li2Se on Lithium Metal for All Solid-State Batteries.pdfDownload
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