Phosphonium plastic crystal salt alloyed with a sodium salt as a solid-state electrolyte for sodium devices: phase behaviour and electrochemical performance

Faezeh Makhlooghiazad; Patrick C Howlett; Xiaoen Wang; Matthias Hilder; Douglas R Macfarlane; Michel Armand; Maria Forsyth

doi:10.1039/c6ta10340e

Phosphonium plastic crystal salt alloyed with a sodium salt as a solid-state electrolyte for sodium devices: phase behaviour and electrochemical performance

Faezeh Makhlooghiazad, Patrick C Howlett, Xiaoen Wang, Matthias Hilder, Douglas R Macfarlane, Michel Armand, Maria Forsyth

School of Chemistry

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

45 Citations (Scopus)

Abstract

Mixtures of triisobutylmethylphosphonium bis(fluorosulfonyl)imide (P_1i444FSI) with different concentrations of NaFSI display composition-dependent phase behaviour with depression of the melting point upon NaFSI addition and suppression of crystallisation in the middle of the phase diagram and a higher-melting-point, NaFSI-rich mixed-phase region at compositions beyond 60 mol% NaFSI. Thermal treatment of the intermediate compositions results in complete crystallisation of the materials. All compositions showed high ionic conductivity (>10^-5 S cm^-1) at 20 °C, and Na symmetric cells containing high concentration of NaFSI (Na|[Na_0.9(P_1i444)_0.1]FSI|Na) were cycled efficiently at 50 and 90 °C at 0.05 and 0.1 mA cm^-2, respectively. Intermediate composition (Na|[Na_0.6(P_1i444)_0.4]FSI|Na) cells were cycled at room temperature and 50 °C at 0.25 mA cm^-2 with very low and stable cell polarisation (200 mV).

Original language	English
Pages (from-to)	5770-5780
Number of pages	11
Journal	Journal of Materials Chemistry A
Volume	5
Issue number	12
DOIs	https://doi.org/10.1039/c6ta10340e
Publication status	Published - 2017

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10.1039/c6ta10340e

31405749-oaAccepted author manuscript, 4.68 MBLicence: Unspecified

Cite this

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title = "Phosphonium plastic crystal salt alloyed with a sodium salt as a solid-state electrolyte for sodium devices: phase behaviour and electrochemical performance",

abstract = "Mixtures of triisobutylmethylphosphonium bis(fluorosulfonyl)imide (P1i444FSI) with different concentrations of NaFSI display composition-dependent phase behaviour with depression of the melting point upon NaFSI addition and suppression of crystallisation in the middle of the phase diagram and a higher-melting-point, NaFSI-rich mixed-phase region at compositions beyond 60 mol% NaFSI. Thermal treatment of the intermediate compositions results in complete crystallisation of the materials. All compositions showed high ionic conductivity (>10-5 S cm-1) at 20 °C, and Na symmetric cells containing high concentration of NaFSI (Na|[Na0.9(P1i444)0.1]FSI|Na) were cycled efficiently at 50 and 90 °C at 0.05 and 0.1 mA cm-2, respectively. Intermediate composition (Na|[Na0.6(P1i444)0.4]FSI|Na) cells were cycled at room temperature and 50 °C at 0.25 mA cm-2 with very low and stable cell polarisation (200 mV).",

author = "Faezeh Makhlooghiazad and Howlett, {Patrick C} and Xiaoen Wang and Matthias Hilder and Macfarlane, {Douglas R} and Michel Armand and Maria Forsyth",

year = "2017",

doi = "10.1039/c6ta10340e",

language = "English",

volume = "5",

pages = "5770--5780",

journal = "Journal of Materials Chemistry A",

issn = "2050-7488",

publisher = "The Royal Society of Chemistry",

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Phosphonium plastic crystal salt alloyed with a sodium salt as a solid-state electrolyte for sodium devices: phase behaviour and electrochemical performance. / Makhlooghiazad, Faezeh; Howlett, Patrick C; Wang, Xiaoen et al.
In: Journal of Materials Chemistry A, Vol. 5, No. 12, 2017, p. 5770-5780.

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

TY - JOUR

T1 - Phosphonium plastic crystal salt alloyed with a sodium salt as a solid-state electrolyte for sodium devices

T2 - phase behaviour and electrochemical performance

AU - Makhlooghiazad, Faezeh

AU - Howlett, Patrick C

AU - Wang, Xiaoen

AU - Hilder, Matthias

AU - Macfarlane, Douglas R

AU - Armand, Michel

AU - Forsyth, Maria

PY - 2017

Y1 - 2017

N2 - Mixtures of triisobutylmethylphosphonium bis(fluorosulfonyl)imide (P1i444FSI) with different concentrations of NaFSI display composition-dependent phase behaviour with depression of the melting point upon NaFSI addition and suppression of crystallisation in the middle of the phase diagram and a higher-melting-point, NaFSI-rich mixed-phase region at compositions beyond 60 mol% NaFSI. Thermal treatment of the intermediate compositions results in complete crystallisation of the materials. All compositions showed high ionic conductivity (>10-5 S cm-1) at 20 °C, and Na symmetric cells containing high concentration of NaFSI (Na|[Na0.9(P1i444)0.1]FSI|Na) were cycled efficiently at 50 and 90 °C at 0.05 and 0.1 mA cm-2, respectively. Intermediate composition (Na|[Na0.6(P1i444)0.4]FSI|Na) cells were cycled at room temperature and 50 °C at 0.25 mA cm-2 with very low and stable cell polarisation (200 mV).

AB - Mixtures of triisobutylmethylphosphonium bis(fluorosulfonyl)imide (P1i444FSI) with different concentrations of NaFSI display composition-dependent phase behaviour with depression of the melting point upon NaFSI addition and suppression of crystallisation in the middle of the phase diagram and a higher-melting-point, NaFSI-rich mixed-phase region at compositions beyond 60 mol% NaFSI. Thermal treatment of the intermediate compositions results in complete crystallisation of the materials. All compositions showed high ionic conductivity (>10-5 S cm-1) at 20 °C, and Na symmetric cells containing high concentration of NaFSI (Na|[Na0.9(P1i444)0.1]FSI|Na) were cycled efficiently at 50 and 90 °C at 0.05 and 0.1 mA cm-2, respectively. Intermediate composition (Na|[Na0.6(P1i444)0.4]FSI|Na) cells were cycled at room temperature and 50 °C at 0.25 mA cm-2 with very low and stable cell polarisation (200 mV).

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U2 - 10.1039/c6ta10340e

DO - 10.1039/c6ta10340e

M3 - Article

AN - SCOPUS:85016147809

SN - 2050-7488

VL - 5

SP - 5770

EP - 5780

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 12

ER -

Phosphonium plastic crystal salt alloyed with a sodium salt as a solid-state electrolyte for sodium devices: phase behaviour and electrochemical performance

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ARC Centre of Excellence for Electromaterials Science

Protonic Materials for Green Chemical Futures

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Phosphonium plastic crystal salt alloyed with a sodium salt as a solid-state electrolyte for sodium devices: phase behaviour and electrochemical performance

Abstract

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ARC Centre of Excellence for Electromaterials Science

Protonic Materials for Green Chemical Futures

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