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dc.contributor.author | Shimoda, Keiji | en |
dc.contributor.author | Takeuchi, Tomonari | en |
dc.contributor.author | Murakami, Miwa | en |
dc.contributor.author | Sakaebe, Hikari | en |
dc.contributor.alternative | 下田, 景士 | ja |
dc.contributor.alternative | 村上, 美和 | ja |
dc.date.accessioned | 2022-08-25T05:18:25Z | - |
dc.date.available | 2022-08-25T05:18:25Z | - |
dc.date.issued | 2022-07 | - |
dc.identifier.uri | http://hdl.handle.net/2433/275967 | - |
dc.description.abstract | Due to the high theoretical capacity, VS₄ is a promising electrode material for next-generation rechargeable batteries. In this study, the lithium insertion and conversion process of amorphous VS₄ was investigated using operando electrochemical nuclear magnetic resonance (NMR) spectroscopy. Amorphous VS₄ has a chain-like structure similar to that of crystalline VS₄. The chain structure was drastically changed to the [VS₄]³⁻ tetrahedral structure by lithium insertion up to the Li₃VS₄ composition. The lithium insertion into the [VS₄]³⁻-based structure proceeded further up to the Li₆VS₄ composition, with charge compensation by the reduction of the V valency. Finally, the conversion reaction from amorphous Li₆VS₄ to metallic V and 4Li₂S was observed. The structural reversibility of amorphous VS₄ was confirmed after the delithiation. It is worth mentioning that the delithiation process from the conversion products was different from the lithiation, resulting in a relatively large voltage hysteresis. Broadly, this study demonstrates that the operando electrochemical NMR technique is a useful tool for investigating the complex reaction system of non-crystalline battery materials. | en |
dc.language.iso | eng | - |
dc.publisher | Elsevier BV | en |
dc.rights | © 2022. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International license. | en |
dc.rights | The full-text file will be made open to the public on 1 July 2024 in accordance with publisher's 'Terms and Conditions for Self-Archiving'. | en |
dc.rights | This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 | en |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | - |
dc.subject | Lithium‑sulfur battery | en |
dc.subject | Vanadium sulfides | en |
dc.subject | Amorphous transition metal polysulfides | en |
dc.subject | Operando NMR spectroscopy | en |
dc.title | Reversible lithium insertion and conversion process of amorphous VS₄ revealed by operando electrochemical NMR spectroscopy | en |
dc.type | journal article | - |
dc.type.niitype | Journal Article | - |
dc.identifier.jtitle | Solid State Ionics | en |
dc.identifier.volume | 380 | - |
dc.relation.doi | 10.1016/j.ssi.2022.115920 | - |
dc.textversion | author | - |
dc.identifier.artnum | 115920 | - |
dcterms.accessRights | embargoed access | - |
datacite.date.available | 2024-07-01 | - |
dc.identifier.pissn | 0167-2738 | - |
出現コレクション: | 学術雑誌掲載論文等 |
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