In-situ XRD study of the succinonitrile-lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) phase diagram

P. S. Whitfield; A. Abouimrane; I. J. Davidson

doi:10.1016/j.ssi.2010.04.004

In-situ XRD study of the succinonitrile-lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) phase diagram

P. S. Whitfield, A. Abouimrane, I. J. Davidson

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

23 Scopus citations

Abstract

The salt lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) when dissolved in plastic crystal succinonitrile has been demonstrated to have particularly good conductivity even at room temperature. In-situ X-ray diffraction (XRD) measurements have previously proved invaluable in interpreting the differential scanning calorimetry (DSC) behavior, but the practical lower temperature limit of approximately - 45 °C was higher than the - 100 °C starting temperature of the DSC measurements, and the important crystalline to plastic crystal transition of succinonitrile. An improved cryo-flow system capable of capillary sample temperatures down to - 192 °C without icing can now easily match the DSC conditions. The previously puzzling DSC behavior of the succinonitrile-LiTFSI phase diagram at low temperatures has now been explained, with a surprising formation of a TFSI-rich adduct on heating from - 100 °C even at concentrations as low as 2 mol%. Crown

Original language	English
Pages (from-to)	740-744
Number of pages	5
Journal	Solid State Ionics
Volume	181
Issue number	15-16
DOIs	https://doi.org/10.1016/j.ssi.2010.04.004
State	Published - Jun 3 2010
Externally published	Yes

Keywords

Electrolyte
Lithium batteries
Phase diagram
X-ray diffraction

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10.1016/j.ssi.2010.04.004

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title = "In-situ XRD study of the succinonitrile-lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) phase diagram",

abstract = "The salt lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) when dissolved in plastic crystal succinonitrile has been demonstrated to have particularly good conductivity even at room temperature. In-situ X-ray diffraction (XRD) measurements have previously proved invaluable in interpreting the differential scanning calorimetry (DSC) behavior, but the practical lower temperature limit of approximately - 45 °C was higher than the - 100 °C starting temperature of the DSC measurements, and the important crystalline to plastic crystal transition of succinonitrile. An improved cryo-flow system capable of capillary sample temperatures down to - 192 °C without icing can now easily match the DSC conditions. The previously puzzling DSC behavior of the succinonitrile-LiTFSI phase diagram at low temperatures has now been explained, with a surprising formation of a TFSI-rich adduct on heating from - 100 °C even at concentrations as low as 2 mol\%. Crown",

keywords = "Electrolyte, Lithium batteries, Phase diagram, X-ray diffraction",

author = "Whitfield, \{P. S.\} and A. Abouimrane and Davidson, \{I. J.\}",

year = "2010",

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doi = "10.1016/j.ssi.2010.04.004",

language = "English",

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journal = "Solid State Ionics",

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T1 - In-situ XRD study of the succinonitrile-lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) phase diagram

AU - Whitfield, P. S.

AU - Abouimrane, A.

AU - Davidson, I. J.

PY - 2010/6/3

Y1 - 2010/6/3

N2 - The salt lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) when dissolved in plastic crystal succinonitrile has been demonstrated to have particularly good conductivity even at room temperature. In-situ X-ray diffraction (XRD) measurements have previously proved invaluable in interpreting the differential scanning calorimetry (DSC) behavior, but the practical lower temperature limit of approximately - 45 °C was higher than the - 100 °C starting temperature of the DSC measurements, and the important crystalline to plastic crystal transition of succinonitrile. An improved cryo-flow system capable of capillary sample temperatures down to - 192 °C without icing can now easily match the DSC conditions. The previously puzzling DSC behavior of the succinonitrile-LiTFSI phase diagram at low temperatures has now been explained, with a surprising formation of a TFSI-rich adduct on heating from - 100 °C even at concentrations as low as 2 mol%. Crown

AB - The salt lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) when dissolved in plastic crystal succinonitrile has been demonstrated to have particularly good conductivity even at room temperature. In-situ X-ray diffraction (XRD) measurements have previously proved invaluable in interpreting the differential scanning calorimetry (DSC) behavior, but the practical lower temperature limit of approximately - 45 °C was higher than the - 100 °C starting temperature of the DSC measurements, and the important crystalline to plastic crystal transition of succinonitrile. An improved cryo-flow system capable of capillary sample temperatures down to - 192 °C without icing can now easily match the DSC conditions. The previously puzzling DSC behavior of the succinonitrile-LiTFSI phase diagram at low temperatures has now been explained, with a surprising formation of a TFSI-rich adduct on heating from - 100 °C even at concentrations as low as 2 mol%. Crown

KW - Electrolyte

KW - Lithium batteries

KW - Phase diagram

KW - X-ray diffraction

UR - https://www.scopus.com/pages/publications/77953292136

U2 - 10.1016/j.ssi.2010.04.004

DO - 10.1016/j.ssi.2010.04.004

M3 - Article

AN - SCOPUS:77953292136

SN - 0167-2738

VL - 181

SP - 740

EP - 744

JO - Solid State Ionics

JF - Solid State Ionics

IS - 15-16

ER -

In-situ XRD study of the succinonitrile-lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) phase diagram

Abstract

Keywords

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