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dc.contributor.author | Hwang, Jinkwang | en |
dc.contributor.author | Matsumoto, Kazuhiko | en |
dc.contributor.author | Hagiwara, Rika | en |
dc.contributor.alternative | 松本, 一彦 | ja |
dc.contributor.alternative | 萩原, 理加 | ja |
dc.date.accessioned | 2019-12-17T06:12:32Z | - |
dc.date.available | 2019-12-17T06:12:32Z | - |
dc.date.issued | 2019-04-22 | - |
dc.identifier.issn | 2574-0962 | - |
dc.identifier.uri | http://hdl.handle.net/2433/245176 | - |
dc.description.abstract | Practical sodium secondary batteries require high power, high energy density, and long cyclability. The NASICON-type Na₃V₂PO₄)₃(NVP) is often investigated as a positive electrode material due to its high operation voltage, structural stability, and high Na⁺ ion conductivity. To overcome its low electronic conductivity, NVP requires carbon-coating or the addition of conductive materials for practical use. In this study, carbon nanofibers (CNFs) are incorporated as a conductive material along with glucose for carbon coating and fixing CNF frames to NVP particles. Uniform NVP composite and CNFs network (NVPC@CNFs) are obtained by a combination of sonication and the sol–gel method. Electrochemical measurements using a high mass loading electrode around ∼8.5 mg-active material cm⁻² and Na[FSA]-[C₂C₁im = 1-ethyl-3-methylimidazolium, FSA = bis(fluorosulfonyl)amide) ionic liquid electrolyte suggest safe operations of sodium secondary batteries up to intermediate temperatures (∼373 K). The rate performance further improved by using the NVPC@CNFs compared to NVPC and exhibited a high rate capability (at high geometric current density) of 51.1 mAh g⁻¹ at 10C (10.0 mA cm⁻²) at 298 K and 82.3 mAh g⁻¹ at 100C (100 mA cm⁻²) at 363 K (1C = 118 mA g⁻¹, 1.00 mA cm⁻²). Furthermore, this material with an ionic liquid electrolyte exhibited superior Coulombic efficiencies over 3000 cycles of 99.9%. Electrochemical measurements (electrical impedance spectroscopy, charge–discharge test, cycle test, and rate performance test) clarify the electrochemical characteristics of this material. | en |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | American Chemical Society | en |
dc.rights | This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Energy Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsaem.9b00176. | en |
dc.rights | The full-text file will be made open to the public on 26 March 2020 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. | en |
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.subject | sodium secondary battery | en |
dc.subject | NASICON | en |
dc.subject | carbon nanofiber | en |
dc.subject | high mass loading electrode | en |
dc.subject | ionic liquid | en |
dc.title | Na₃V₂(PO₄)₃@Carbon Nanofibers: High Mass Loading Electrode Approaching Practical Sodium Secondary Batteries Utilizing Ionic Liquid Electrolytes | en |
dc.type | journal article | - |
dc.type.niitype | Journal Article | - |
dc.identifier.jtitle | ACS Applied Energy Materials | en |
dc.identifier.volume | 2 | - |
dc.identifier.issue | 4 | - |
dc.identifier.spage | 2818 | - |
dc.identifier.epage | 2827 | - |
dc.relation.doi | 10.1021/acsaem.9b00176 | - |
dc.textversion | author | - |
dc.address | Graduate School of Energy Science, Kyoto University | en |
dc.address | Graduate School of Energy Science, Kyoto University・Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University | en |
dc.address | Graduate School of Energy Science, Kyoto University・Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University | en |
dcterms.accessRights | open access | - |
datacite.date.available | 2020-03-26 | - |
出現コレクション: | 学術雑誌掲載論文等 |
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