The anion effect in ternary electrolyte systems using poly(diallyldimethylammonium) and phosphonium-based ionic liquid with high lithium salt concentration

Yunis, R and Girard, GMA and Wang, X and Zhu, H and Bhattacharyya, AJ and Howlett, P and MacFarlane, DR and Forsyth, M (2018) The anion effect in ternary electrolyte systems using poly(diallyldimethylammonium) and phosphonium-based ionic liquid with high lithium salt concentration. In: Solid State Ionics, 327 . pp. 83-92.

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Abstract

Poly(dialyldimethylammonium) (PDADMA) is a popular host for ion gel or composite polymer electrolytes for lithium batteries. Novel ternary systems are synthesised in this work by mixing high concentrations of lithium salt (lithium bis(fluorosulfonyl)imide (LiFSI)) with trimethylisobutylphosphonium bis(fluorosulfonyl)imide (P111i4FSI) and PDADMA FSI. The aim of this work is to provide a comparison of the FSI-system with NTf2-system. Phase behaviour, structure and transport properties of these ternary systems were investigated using thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), electrochemical impedance spectroscopy (EIS), attenuated total reflectance fourier transform infrared spectroscopy (ATR-FTIR) and solid state nuclear magnetic resonance (solid-state NMR). A free standing flexible and transparent membrane is obtained with 60:40 wt% (Electrolyte (3.8 m LiFSI in P111i4FSI (LiFSI/IL)): PDADMA FSI), attaining a conductivity of 0.49 mS/cm at 40 °C with a Li+ transference number of 0.21 at 50 °C. © 2018

Item Type:	Journal Article
Publication:	Solid State Ionics
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to Elsevier B.V.
Keywords:	Differential scanning calorimetry; Electrochemical impedance spectroscopy; Fourier transform infrared spectroscopy; Gravimetric analysis; Ionic liquids; Ions; Lithium compounds; Lithium-ion batteries; Nuclear magnetic resonance; Nuclear magnetic resonance spectroscopy; Polymers; Ternary systems; Thermogravimetric analysis, Attenuated total reflectance fourier transform infrared spectroscopies (ATR FTIR); Bis(fluorosulfonyl)imide; Dynamic mechanical analysis (DMA); Free standing membranes; Polies (diallyldimethylammonium); Solid-state nuclear magnetic resonance; Thermal gravimetric analyses (TGA); Trimethylisobutylphosphonium, Polyelectrolytes
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	02 Aug 2022 11:37
Last Modified:	02 Aug 2022 11:37
URI:	https://eprints.iisc.ac.in/id/eprint/75125

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