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j.jpowsour.2017.12.003.pdf | 917.13 kB | Adobe PDF | 見る/開く |
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dc.contributor.author | Hwang, Jinkwang | - |
dc.contributor.author | Matsumoto, Kazuhiko | - |
dc.contributor.author | Orikasa, Yuki | - |
dc.contributor.author | Katayama, Misaki | - |
dc.contributor.author | Inada, Yasuhiro | - |
dc.contributor.author | Nohira, Toshiyuki | - |
dc.contributor.author | Hagiwara, Rika | - |
dc.contributor.alternative | 黄, 珍光 | - |
dc.contributor.alternative | 松本, 一彦 | - |
dc.contributor.alternative | 野平, 俊之 | - |
dc.contributor.alternative | 萩原, 理加 | - |
dc.date.accessioned | 2021-03-01T02:46:55Z | - |
dc.date.available | 2021-03-01T02:46:55Z | - |
dc.date.issued | 2018-02-15 | - |
dc.identifier.issn | 0378-7753 | - |
dc.identifier.uri | http://hdl.handle.net/2433/261799 | - |
dc.description.abstract | Maricite NaFePO₄ (m-NaFePO₄) was investigated as a positive electrode material for intermediate-temperature operation of sodium secondary batteries using ionic liquid electrolytes. Powdered m-NaFePO₄ was prepared by a conventional solid-state method at 873 K and subsequently fabricated in two different conditions; one is ball-milled in acetone and the other is re-calcined at 873 K after the ball-milling. Electrochemical properties of the electrodes prepared with the as-synthesized m-NaFePO₄, the ball-milled m-NaFePO₄, and the re-calcined m-NaFePO₄ were investigated in Na[FSA]-[C₂C₁im][FSA] (C₂C₁im⁺ = 1-ethyl-3-methylimidazolium, FSA⁻ = bis(fluorosulfonyl)amide) ionic liquid electrolytes at 298 K and 363 K to assess the effects of temperature and particle size on their electrochemical properties. A reversible charge-discharge capacity of 107 mAh g⁻¹ was achieved with a coulombic efficiency >98% from the 2nd cycle using the ball-milled m-NaFePO₄ electrode at a C–rate of 0.1 C and 363 K. Electrochemical impedance spectroscopy using m-NaFePO₄/m-NaFePO₄ symmetric cells indicated that inactive m-NaFePO₄ becomes an active material through ball-milling treatment and elevation of operating temperature. X-ray diffraction analysis of crystalline m-NaFePO₄ confirmed the lattice contraction and expansion upon charging and discharging, respectively. These results indicate that the desodiation-sodiation process in m-NaFePO₄ is reversible in the intermediate-temperature range. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Elsevier BV | - |
dc.rights | © 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/. | - |
dc.rights | 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。 | ja |
dc.rights | This is not the published version. Please cite only the published version. | en |
dc.subject | Sodium secondary batteries | - |
dc.subject | Olivine | - |
dc.subject | MariciteIonic liquid | - |
dc.subject | Intermediate-temperature operation | - |
dc.title | Crystalline maricite NaFePO₄ as a positive electrode material for sodium secondary batteries operating at intermediate temperature | en |
dc.type | journal article | - |
dc.type.niitype | Journal Article | - |
dc.identifier.jtitle | Journal of Power Sources | en |
dc.identifier.volume | 377 | - |
dc.identifier.spage | 80 | - |
dc.identifier.epage | 86 | - |
dc.relation.doi | 10.1016/j.jpowsour.2017.12.003 | - |
dc.textversion | author | - |
dc.address | Graduate School of Energy Science, Kyoto University | - |
dc.address | Graduate School of Energy Science, Kyoto University・Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University | - |
dc.address | Department of Applied Chemistry, Ritsumeikan University | - |
dc.address | Department of Applied Chemistry, Ritsumeikan University | - |
dc.address | Department of Applied Chemistry, Ritsumeikan University | - |
dc.address | Institute of Advanced Energy, Kyoto University・Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University | - |
dc.address | Graduate School of Energy Science, Kyoto University・Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University | - |
dcterms.accessRights | open access | - |
出現コレクション: | 学術雑誌掲載論文等 |
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