A new approach: Li2S-P2S5 thin-films prepared by thermal evaporation as solid electrolytes
- Authors
- Woo, Sung Pil; Kakati, Nitul; Kim, In Yea; Lee, Seok Hee; Yoon, Young Soo
- Issue Date
- Aug-2016
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- Thermal evaporation; Li-S; Solid electrolyte; Ionic conductivity; All-solid-state batteries
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.69, no.4, pp.617 - 622
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 69
- Number
- 4
- Start Page
- 617
- End Page
- 622
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/8073
- DOI
- 10.3938/jkps.69.617
- ISSN
- 0374-4884
- Abstract
- Li2S-P2S5 thin-film solid electrolytes are synthesized by using room-temperature thermal evaporation for use as lithium-ion conductors for all-solid-state Li-ion batteries. The local structures of 75.51Li(2)S:24.49P(2)S(5) and 77.64Li(2)S:22.36P(2)S(5) prepared in this way have hetero units that facilitate lithium-ion mobility. The lithium-ion conductivity at room temperature for the 77.64Li(2)S:22.36P(2)S(5) thin-film (4.0 x 10(-6) S cm(-1)) is higher than that for the 75.51Li(2)S:24.49P(2)S(5) thin-film (1.2 x 10(-6) S cm(-1)). The increased ion conductivity in the 77.64Li(2)S:22.36P(2)S(5) film is due to the additional local P2S7 (4-) structure that forms a glassy state during the thermal evaporation process. The local structure can lead to a high mobility of Li+ ions in the Li2S-P2S5 system due to the non-bridging sulfide ions. Lithium-ion-conducting thin-films prepared by using thermal evaporation, as reported in this study, are promising solid electrolytes.
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Collections - 공과대학 > 신소재공학과 > 1. Journal Articles
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