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dc.contributor.author | Shimoda, Keiji | en |
dc.contributor.author | Koganei, Kazuto | en |
dc.contributor.author | Takeuchi, Tomonari | en |
dc.contributor.author | Matsunaga, Toshiyuki | en |
dc.contributor.author | Murakami, Miwa | en |
dc.contributor.author | Sakaebe, Hikari | en |
dc.contributor.author | Kobayashi, Hironori | en |
dc.contributor.author | Matsubara, Eiichiro | en |
dc.contributor.alternative | 下田, 景士 | ja |
dc.contributor.alternative | 松永, 利之 | ja |
dc.contributor.alternative | 村上, 美和 | ja |
dc.contributor.alternative | 松原, 英一郎 | ja |
dc.date.accessioned | 2022-05-02T07:49:07Z | - |
dc.date.available | 2022-05-02T07:49:07Z | - |
dc.date.issued | 2019 | - |
dc.identifier.uri | http://hdl.handle.net/2433/269541 | - |
dc.description.abstract | Vanadium sulfide (VS₄) is one of the promising positive electrode materials for next-generation rechargeable lithium-ion batteries because of its high theoretical capacity (1196 mA h g⁻¹). Crystalline VS₄ has a unique structure, in which the Peierls-distorted one-dimensional chains of V-V bonds along the c axis are loosely connected to each other through van der Waals interactions. In this study, an amorphous VS₄ is prepared by mechanical milling of the crystalline material, and its lithiation/delithiation behavior is investigated by solid-state nuclear magnetic resonance (NMR) spectroscopy. The amorphous VS₄ shows a chain structure similar to that of crystalline VS₄. The amorphous host structure is found to change drastically during the lithiation process to form Li₃VS₄: the V ions become tetrahedrally coordinated by S ions, in which the valence states of V and S ions simultaneously change from V⁴⁺ to V⁵⁺ and S⁻ to S²⁻, respectively. When the Li insertion proceeds further, the valence state of V ions is reduced. After the 1[st] cycle, the amorphous VS₄ recovers to the chain-like structure although it is highly disordered. No conversion to elemental V is observed, and a high capacity of 700 mA h g⁻¹ is reversibly delivered between 1.5 and 2.6 V. | en |
dc.language.iso | eng | - |
dc.publisher | Royal Society of Chemistry (RSC) | en |
dc.rights | © The Royal Society of Chemistry 2019 | en |
dc.rights | This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. | en |
dc.rights.uri | http://creativecommons.org/licenses/by-nc/3.0/ | - |
dc.title | Structural characterization of an amorphous VS₄ and its lithiation/delithiation behavior studied by solid-state NMR spectroscopy | en |
dc.type | journal article | - |
dc.type.niitype | Journal Article | - |
dc.identifier.jtitle | RSC Advances | en |
dc.identifier.volume | 9 | - |
dc.identifier.issue | 41 | - |
dc.identifier.spage | 23979 | - |
dc.identifier.epage | 23985 | - |
dc.relation.doi | 10.1039/C9RA04338A | - |
dc.textversion | publisher | - |
dc.identifier.pmid | 35530591 | - |
dcterms.accessRights | open access | - |
dc.identifier.eissn | 2046-2069 | - |
出現コレクション: | 学術雑誌掲載論文等 |
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