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Electronic states in oxidized Na x CoO 2 as revealed by X-ray absorption spectroscopy coupled with ab initio calculation
http://hdl.handle.net/2241/00153368
http://hdl.handle.net/2241/00153368bb16710d-218b-4fca-b92c-bee1c99fe2e9
名前 / ファイル | ライセンス | アクション |
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JPS_384 (1.2 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2018-10-01 | |||||
タイトル | ||||||
タイトル | Electronic states in oxidized Na x CoO 2 as revealed by X-ray absorption spectroscopy coupled with ab initio calculation | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Niwa, Hideharu
× Niwa, Hideharu× Higashiyama, Kazuyuki× Amaha, Kaoru× Kobayashi, Wataru× Moritomo, Yutaka |
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著者別名 |
丹羽, 秀治
× 丹羽, 秀治× 東山, 和幸× 小林, 航× 守友, 浩 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Layered cobalt oxides are promising cathode materials for sodium ion secondary batteries (SIBs). By combined study of the X-ray absorption spectroscopy (XAS) around the O K-edge and ab initio calculation, we investigated the electronic state of the NaxCoO2 with different oxidization state, i.e, in O3-Na0.91CoO2 (CoO2−0.91) and P2-Na0.66CoO2 (CoO2−0.66). The O K-edge spectra in the pre-edge (529–536 eV) region shows significant change with oxidization of NaxCoO2. In O3-Na0.91CoO2, the spectra shows an intense band (B band) at 531 eV. In P2-Na0.66CoO2, the spectral weight of the B band increases and a new band (A band) appears at 530 eV. These spectral changes are qualitatively reproduced by the calculated partial density of states (pDOSs) of O3-NaCoO2 and P2-Na1/2CoO2. These results indicate that the electrons are partially removed from the O 2p state with oxidization of NaxCoO2. | |||||
書誌情報 |
Journal of power sources 巻 384, p. 156-159, 発行日 2018-04 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0378-7753 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00705373 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1016/j.jpowsour.2018.02.075 | |||||
権利 | ||||||
権利情報 | © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | |||||
著者版フラグ | ||||||
値 | author | |||||
出版者 | ||||||
出版者 | Elsevier |