Characterization of thin-film electrolytes for all solid-state batteries > Publication | UNIST YK RESEARCH

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Publication

Characterization of thin-film electrolytes for all solid-state batteries
Author
Inseok Seo, Youngsik Kim, Steve W. Martin
Journal
Journal of Alloys and Compounds
Vol
661
Page
245-250
Year
2016
In this study, amorphous lithium thio-germanate thin-films were prepared as electrolytes for solid-state lithium rechargeable batteries by using RF sputtering deposition in an Ar atmospheres. High quality lithium germanium sulfide, nLi2S + GeS2(n = 1, 2, and 3) thin-films have been successfully made by RF sputtering and synthesized as solid-state electrolytes. Although these materials are unstable in air the thin-films were thoroughly characterized by X-ray diffraction (XRD), Scanning electron spectroscopy (SEM), Raman spectroscopy, Infrared spectroscopy (IR), and impedance spectroscopy using special setups to prevent contamination. The ionic conductivities of the thin-films are ∼3 order magnitude higher than reported values for oxide thin-films. In this way, this work may provide a new way for developing new thin-film electrolytes for solid-state lithium ion batteries.