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dc.contributor.author | HWANG, Jinkwang | en |
dc.contributor.author | MATSUMOTO, Kazuhiko | en |
dc.contributor.author | NOHIRA, Toshiyuki | en |
dc.contributor.author | HAGIWARA, Rika | en |
dc.contributor.alternative | 松本, 一彦 | ja |
dc.contributor.alternative | 野平, 俊之 | ja |
dc.contributor.alternative | 萩原, 理加 | ja |
dc.date.accessioned | 2018-07-05T06:18:53Z | - |
dc.date.available | 2018-07-05T06:18:53Z | - |
dc.date.issued | 2017-10 | - |
dc.identifier.issn | 1344-3542 | - |
dc.identifier.uri | http://hdl.handle.net/2433/232598 | - |
dc.description.abstract | Maricite NaFePO₄ (m-NaFePO₄) has long been regarded as an electrochemically inactive material because Na+ cannot overcome the activation energy of its diffusion pathways for sodium extraction and insertion in the structure. In this study, the charge-discharge behavior of m-NaFePO₄ ball-milled to the nano-size level was investigated in Na[FSA]-[C₃C₁pyrr][FSA] (C₃C₁pyrr = N-methyl-N-propylpyrrolidinium and FSA = bis(fluorosulfonyl)amide) ionic liquid electrolyte at 298 and 363 K. The charge-discharge performance was improved upon elevating the operational temperature, possibly because of the enhanced Na+ diffusion in the maricite structure and in the electrolyte, and improved electrode reaction. The reversible capacity at 363 K increased with consecutive cycles and reached 100 mAh g−1 with nearly 100% coulombic efficiency in the 120th cycle at the C/2 rate. Ex-situ XRD results confirmed the preservation of the maricite phase after cycling, which may indicate that the practical capacity for maricite NaFePO₄ without amorphization. By reconsideration of electrochemically inactive materials for intermediate temperature operation, this study suggests the possibility of extending the range of available positive electrode materials for sodium secondary batteries. | en |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Electrochemical Society of Japan | en |
dc.publisher.alternative | 電気化学会 | ja |
dc.rights | This is an open access article. | en |
dc.rights | © 2017 The Electrochemical Society of Japan. | en |
dc.subject | Sodium Secondary Battery | en |
dc.subject | Ionic Liquid | en |
dc.subject | Energy Storage | en |
dc.subject | Maricite | en |
dc.title | Electrochemical Sodiation-desodiation of Maricite NaFePO₄ in Ionic Liquid Electrolyte | en |
dc.type | journal article | - |
dc.type.niitype | Journal Article | - |
dc.identifier.jtitle | Electrochemistry | en |
dc.identifier.volume | 85 | - |
dc.identifier.issue | 10 | - |
dc.identifier.spage | 675 | - |
dc.identifier.epage | 679 | - |
dc.relation.doi | 10.5796/electrochemistry.85.675 | - |
dc.textversion | publisher | - |
dc.address | Graduate School of Energy Science, Kyoto University | en |
dc.address | Graduate School of Energy Science, Kyoto University | en |
dc.address | Institute of Advanced Energy, Kyoto University | en |
dc.address | Graduate School of Energy Science, Kyoto University | en |
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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