Epitaxial Growth of Nanostructured Li2Se on Lithium Metal for All Solid-State Batteriesopen access
- Authors
- Park, Hyunjung; Kim, Jeongheon; Lee, Dongsoo; Park, Joonhyeok; Jo, Seonghan; Kim, Jaeik; Song, Taeseup; Paik, Ungyu
- Issue Date
- Jun-2021
- Publisher
- WILEY
- Keywords
- all solid-state batteries; lithium metal; lithium selenide; protective layer; sulfide-based electrolyte
- Citation
- ADVANCED SCIENCE, v.8, no.11, pp.1 - 7
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED SCIENCE
- Volume
- 8
- Number
- 11
- Start Page
- 1
- End Page
- 7
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/1093
- DOI
- 10.1002/advs.202004204
- ISSN
- 2198-3844
- 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.
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