Physicochemical properties of N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide for sodium metal battery applications

Hyungook Yoon; Haijin Zhu; Aziliz Hervault; Michel Armand; Douglas R. MacFarlane; Maria Forsyth

doi:10.1039/c4cp00365a

Physicochemical properties of N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide for sodium metal battery applications

Hyungook Yoon^*, Haijin Zhu, Aziliz Hervault, Michel Armand, Douglas R. MacFarlane, Maria Forsyth

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The physicochemical properties of a range of NaNTf₂ (or NaTFSI) salt concentrations in N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (or C₃mpyrFSI) ionic liquid were investigated by DSC, conductivity, cyclic voltammetry and diffusivity studies. Cyclic voltammetry indicated a stable sodium plating behavior with a current of 5 mA cm^-2 at 25 °C to 20 mA cm^-2 at 100 °C, along with high reversibility identifying this electrolyte as a possible candidate for sodium-ion or sodium metal battery applications. ²³Na NMR chemical shifts and spectral linewidths (FWHM) indicate a complex coordination of the Na⁺ ion which is dependent on both temperature and salt concentration with an apparently stronger coordination to the NTf2 anion upon increasing the NaNTf₂ concentration. Temperature dependent PFG-NMR diffusion measurements show that both FSI and NTf₂ have a comparable behaviour although the smaller FSI anion is more diffusive.

Original language	English
Pages (from-to)	12350-12355
Number of pages	6
Journal	Physical Chemistry Chemical Physics
Volume	16
Issue number	24
DOIs	https://doi.org/10.1039/c4cp00365a
State	Published - 28 Jun 2014
Externally published	Yes

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title = "Physicochemical properties of N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide for sodium metal battery applications",

abstract = "The physicochemical properties of a range of NaNTf2 (or NaTFSI) salt concentrations in N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (or C3mpyrFSI) ionic liquid were investigated by DSC, conductivity, cyclic voltammetry and diffusivity studies. Cyclic voltammetry indicated a stable sodium plating behavior with a current of 5 mA cm-2 at 25 °C to 20 mA cm-2 at 100 °C, along with high reversibility identifying this electrolyte as a possible candidate for sodium-ion or sodium metal battery applications. 23Na NMR chemical shifts and spectral linewidths (FWHM) indicate a complex coordination of the Na+ ion which is dependent on both temperature and salt concentration with an apparently stronger coordination to the NTf2 anion upon increasing the NaNTf2 concentration. Temperature dependent PFG-NMR diffusion measurements show that both FSI and NTf2 have a comparable behaviour although the smaller FSI anion is more diffusive.",

author = "Hyungook Yoon and Haijin Zhu and Aziliz Hervault and Michel Armand and MacFarlane, {Douglas R.} and Maria Forsyth",

year = "2014",

month = jun,

day = "28",

doi = "10.1039/c4cp00365a",

language = "英语",

volume = "16",

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journal = "Physical Chemistry Chemical Physics",

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T1 - Physicochemical properties of N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide for sodium metal battery applications

AU - Yoon, Hyungook

AU - Zhu, Haijin

AU - Hervault, Aziliz

AU - Armand, Michel

AU - MacFarlane, Douglas R.

AU - Forsyth, Maria

PY - 2014/6/28

Y1 - 2014/6/28

N2 - The physicochemical properties of a range of NaNTf2 (or NaTFSI) salt concentrations in N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (or C3mpyrFSI) ionic liquid were investigated by DSC, conductivity, cyclic voltammetry and diffusivity studies. Cyclic voltammetry indicated a stable sodium plating behavior with a current of 5 mA cm-2 at 25 °C to 20 mA cm-2 at 100 °C, along with high reversibility identifying this electrolyte as a possible candidate for sodium-ion or sodium metal battery applications. 23Na NMR chemical shifts and spectral linewidths (FWHM) indicate a complex coordination of the Na+ ion which is dependent on both temperature and salt concentration with an apparently stronger coordination to the NTf2 anion upon increasing the NaNTf2 concentration. Temperature dependent PFG-NMR diffusion measurements show that both FSI and NTf2 have a comparable behaviour although the smaller FSI anion is more diffusive.

AB - The physicochemical properties of a range of NaNTf2 (or NaTFSI) salt concentrations in N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (or C3mpyrFSI) ionic liquid were investigated by DSC, conductivity, cyclic voltammetry and diffusivity studies. Cyclic voltammetry indicated a stable sodium plating behavior with a current of 5 mA cm-2 at 25 °C to 20 mA cm-2 at 100 °C, along with high reversibility identifying this electrolyte as a possible candidate for sodium-ion or sodium metal battery applications. 23Na NMR chemical shifts and spectral linewidths (FWHM) indicate a complex coordination of the Na+ ion which is dependent on both temperature and salt concentration with an apparently stronger coordination to the NTf2 anion upon increasing the NaNTf2 concentration. Temperature dependent PFG-NMR diffusion measurements show that both FSI and NTf2 have a comparable behaviour although the smaller FSI anion is more diffusive.

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DO - 10.1039/c4cp00365a

M3 - 文章

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JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

IS - 24

ER -

Physicochemical properties of N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide for sodium metal battery applications

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