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Chemical stability of Li4PS4I solid electrolyte against hydrolysis
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| Title: | Chemical stability of Li4PS4I solid electrolyte against hydrolysis |
| Authors: | Calpa, Marcela Browse this author | | Rosero-Navarro, Nataly Carolina Browse this author | | Miura, Akira Browse this author →KAKEN DB | | Jalem, Randy Browse this author | | Tateyama, Yoshitaka Browse this author | | Tadanaga, Kiyoharu Browse this author →KAKEN DB |
| Keywords: | Solid electrolyte | | Sulfide electrolyte | | Chemical stability | | Lithium battery | | All-solid-state battery |
| Issue Date: | Mar-2021 |
| Publisher: | Elsevier |
| Journal Title: | Applied materials today |
| Volume: | 22 |
| Start Page: | 100918 |
| Publisher DOI: | 10.1016/j.apmt.2020.100918 |
| Abstract: | Sulfide solid electrolytes in the Li3PS4-LiI system are promising for all-solid-state batteries owing to their high ionic conductivity in the order of 10(-4) S cm(-1) and electrochemical stability. Nonetheless, the low chemical stability tendency of sulfide-based materials under ambient atmosphere is a critical issue due to the generation of toxic H2S gas. In this study, the chemical stability of Li4PS4I (Li3PS4-LiI) solid electrolyte under ambient atmosphere was investigated and compared with that of Li3PS4 to analyze the effect of the incorporation of LiI on the chemical stability of sulfide-based electrolytes. No generation of H2S gas was detected in the Li4PS4I solid electrolyte after an exposure of 60 min to the ambient atmosphere with high relative humidity of 40%. The hydrolysis suppression is attributed to the formation of LiI center dot H2O, acting as a protective barrier between PS43- units in the electrolyte and H2O molecules in air. The structural reversibility of Li4PS4I by simple drying at 180 degrees C was confirmed and the solid electrolyte exhibited an ionic conductivity of 10(-4) S cm(-1) at room temperature, similar to that of the sample before the exposure to the ambient atmosphere. |
| Rights: | ©2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/87555 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: Nataly Carolina Rosero Navarro
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