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

journal contribution
posted on 01.12.2018, 00:00 authored by Ruhamah Yunis, Gaetan Girard, Xiaoen WangXiaoen Wang, Haijin Zhu, A J Bhattacharyya, Patrick HowlettPatrick Howlett, D R MacFarlane, Maria ForsythMaria Forsyth
© 2018 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.

History

Journal

Solid State Ionics

Volume

327

Pagination

83 - 92

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

0167-2738

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2018, Elsevier