Electrochemical and physicochemical properties of small phosphonium cation ionic liquid electrolytes with high lithium salt content

G. M.A. Girard; M. Hilder; H. Zhu; D. Nucciarone; K. Whitbread; S. Zavorine; M. Moser; M. Forsyth; D. R. Macfarlane; P. C. Howlett

doi:10.1039/c5cp00205b

Electrochemical and physicochemical properties of small phosphonium cation ionic liquid electrolytes with high lithium salt content

G. M.A. Girard, M. Hilder, H. Zhu, D. Nucciarone, K. Whitbread, S. Zavorine, M. Moser, M. Forsyth, D. R. Macfarlane, P. C. Howlett^*

^*Corresponding author for this work

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

119 Scopus citations

Abstract

Electrolytes of a room temperature ionic liquid (RTIL), trimethyl(isobutyl)phosphonium (P_111i4) bis(fluorosulfonyl)imide (FSI) with a wide range of lithium bis(fluorosulfonyl)imide (LiFSI) salt concentrations (up to 3.8 mol kg^-1 of salt in the RTIL) were characterised using a combination of techniques including viscosity, conductivity, differential scanning calorimetry (DSC), electrochemical impedance spectroscopy (EIS), nuclear magnetic resonance (NMR) and cyclic voltammetry (CV). We show that the FSI-based electrolyte containing a high salt concentration (e.g. 1:1 salt to IL molar ratio, equivalent to 3.2 mol kg^-1 of LiFSI) displays unusual transport behavior with respect to lithium ion mobility and promising electrochemical behavior, despite an increase in viscosity. These electrolytes could compete with the more traditionally studied nitrogen-based ionic liquids (ILs) in lithium battery applications.

Original language	English
Pages (from-to)	8706-8713
Number of pages	8
Journal	Physical Chemistry Chemical Physics
Volume	17
Issue number	14
DOIs	https://doi.org/10.1039/c5cp00205b
State	Published - 14 Apr 2015
Externally published	Yes

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Girard, G. M. A., Hilder, M., Zhu, H., Nucciarone, D., Whitbread, K., Zavorine, S., Moser, M., Forsyth, M., Macfarlane, D. R., & Howlett, P. C. (2015). Electrochemical and physicochemical properties of small phosphonium cation ionic liquid electrolytes with high lithium salt content. Physical Chemistry Chemical Physics, 17(14), 8706-8713. https://doi.org/10.1039/c5cp00205b

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title = "Electrochemical and physicochemical properties of small phosphonium cation ionic liquid electrolytes with high lithium salt content",

abstract = "Electrolytes of a room temperature ionic liquid (RTIL), trimethyl(isobutyl)phosphonium (P111i4) bis(fluorosulfonyl)imide (FSI) with a wide range of lithium bis(fluorosulfonyl)imide (LiFSI) salt concentrations (up to 3.8 mol kg-1 of salt in the RTIL) were characterised using a combination of techniques including viscosity, conductivity, differential scanning calorimetry (DSC), electrochemical impedance spectroscopy (EIS), nuclear magnetic resonance (NMR) and cyclic voltammetry (CV). We show that the FSI-based electrolyte containing a high salt concentration (e.g. 1:1 salt to IL molar ratio, equivalent to 3.2 mol kg-1 of LiFSI) displays unusual transport behavior with respect to lithium ion mobility and promising electrochemical behavior, despite an increase in viscosity. These electrolytes could compete with the more traditionally studied nitrogen-based ionic liquids (ILs) in lithium battery applications.",

author = "Girard, {G. M.A.} and M. Hilder and H. Zhu and D. Nucciarone and K. Whitbread and S. Zavorine and M. Moser and M. Forsyth and Macfarlane, {D. R.} and Howlett, {P. C.}",

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year = "2015",

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doi = "10.1039/c5cp00205b",

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T1 - Electrochemical and physicochemical properties of small phosphonium cation ionic liquid electrolytes with high lithium salt content

AU - Girard, G. M.A.

AU - Hilder, M.

AU - Zhu, H.

AU - Nucciarone, D.

AU - Whitbread, K.

AU - Zavorine, S.

AU - Moser, M.

AU - Forsyth, M.

AU - Macfarlane, D. R.

AU - Howlett, P. C.

PY - 2015/4/14

Y1 - 2015/4/14

N2 - Electrolytes of a room temperature ionic liquid (RTIL), trimethyl(isobutyl)phosphonium (P111i4) bis(fluorosulfonyl)imide (FSI) with a wide range of lithium bis(fluorosulfonyl)imide (LiFSI) salt concentrations (up to 3.8 mol kg-1 of salt in the RTIL) were characterised using a combination of techniques including viscosity, conductivity, differential scanning calorimetry (DSC), electrochemical impedance spectroscopy (EIS), nuclear magnetic resonance (NMR) and cyclic voltammetry (CV). We show that the FSI-based electrolyte containing a high salt concentration (e.g. 1:1 salt to IL molar ratio, equivalent to 3.2 mol kg-1 of LiFSI) displays unusual transport behavior with respect to lithium ion mobility and promising electrochemical behavior, despite an increase in viscosity. These electrolytes could compete with the more traditionally studied nitrogen-based ionic liquids (ILs) in lithium battery applications.

AB - Electrolytes of a room temperature ionic liquid (RTIL), trimethyl(isobutyl)phosphonium (P111i4) bis(fluorosulfonyl)imide (FSI) with a wide range of lithium bis(fluorosulfonyl)imide (LiFSI) salt concentrations (up to 3.8 mol kg-1 of salt in the RTIL) were characterised using a combination of techniques including viscosity, conductivity, differential scanning calorimetry (DSC), electrochemical impedance spectroscopy (EIS), nuclear magnetic resonance (NMR) and cyclic voltammetry (CV). We show that the FSI-based electrolyte containing a high salt concentration (e.g. 1:1 salt to IL molar ratio, equivalent to 3.2 mol kg-1 of LiFSI) displays unusual transport behavior with respect to lithium ion mobility and promising electrochemical behavior, despite an increase in viscosity. These electrolytes could compete with the more traditionally studied nitrogen-based ionic liquids (ILs) in lithium battery applications.

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U2 - 10.1039/c5cp00205b

DO - 10.1039/c5cp00205b

M3 - 文章

AN - SCOPUS:84961292129

SN - 1463-9076

VL - 17

SP - 8706

EP - 8713

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

IS - 14

ER -

Electrochemical and physicochemical properties of small phosphonium cation ionic liquid electrolytes with high lithium salt content

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