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dc.contributor.authorYang, Huanen_US
dc.contributor.authorLuo, Xu-Fengen_US
dc.contributor.authorMatsumoto, Kazuhikoen_US
dc.contributor.authorChang, Jeng-Kueien_US
dc.contributor.authorHagiwara, Rikaen_US
dc.date.accessioned2020-10-05T01:59:52Z-
dc.date.available2020-10-05T01:59:52Z-
dc.date.issued2020-09-15en_US
dc.identifier.issn0378-7753en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.jpowsour.2020.228406en_US
dc.identifier.urihttp://hdl.handle.net/11536/155000-
dc.description.abstractIn this study, thermal, physical, and electrochemical properties of the ionic liquid electrolyte system, Na[FTA]-[C(3)C(1)pyrr][FTA], (FTA(-) = (fluorosulfonyl) (trifluoromethylsulfonyl)amide and C(3)C(1)pyrr(+) = N-methyl-N-pro-pylpyrrolidinium) have been investigated for Na secondary batteries. The asymmetric FTA. structure provides a wide liquid-phase temperature range, especially at low x(Na[FTA]) (x(Na[FTA]) = molar fraction of Na[FTA]) and low temperature range. Glass transition at 170-209 K is the only observed thermal behavior in the x(Na [FTA]) of 0.0-0.4. Temperature dependence of viscosity and ionic conductivity obeys the Vogel-Tammann-Fulcher equation, and the correlation between molar conductivity and viscosity follows the fractional Walden rule. The anodic potential limits are above 5 V vs. Na+/Na at 298 and 363 K. The noticeable effects of x(Na [FTA]) are observed in the electrochemical performance of Na metal and hard carbon electrodes. In both cases, a moderate concentration, x(Na[FTA]) of 0.2-0.3, enables favorable charge-discharge behavior. At 363 K, the discharge capacities of the hard carbon electrode at x(Na[FTA]) of 0.3 are 260 and 236 mAh g(-1) at the current densities of 20 and 200 mA g(-1), respectively. The optimum cycling performance occurs at x(Na[FTA]) = 0.3, providing satisfactory capacity retention and high average Coulombic efficiency.en_US
dc.language.isoen_USen_US
dc.subjectNa secondary batteriesen_US
dc.subjectIonic liquidsen_US
dc.subject(fluorosulfonyl)(trifluoromethylsulfonyl)amideen_US
dc.subjectHard carbonen_US
dc.titlePhysicochemical and electrochemical properties of the (fluorosulfonyl) (trifluoromethylsulfonyl)amide ionic liquid for Na secondary batteriesen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.jpowsour.2020.228406en_US
dc.identifier.journalJOURNAL OF POWER SOURCESen_US
dc.citation.volume470en_US
dc.citation.spage0en_US
dc.citation.epage0en_US
dc.contributor.department材料科學與工程學系zh_TW
dc.contributor.departmentDepartment of Materials Science and Engineeringen_US
dc.identifier.wosnumberWOS:000544260600010en_US
dc.citation.woscount0en_US
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