Characterization of polymer/liquid crystal composite based electrolyte membranes for sodium ion battery applications

A novel PEO/E8 liquid crystal based composite solid polymer electrolyte membranes complexed with NaIO4 salt were prepared by the solution casting technique. The composite-salt complexations were examined by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, micro-Raman and X-ra...

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Bibliographic Details
Published in:Solid state ionics 2019-07, Vol.335, p.86-96
Main Authors: Koduru, H.K., Marinov, Y.G., Hadjichristov, G.B., Scaramuzza, N.
Format: Article
Language:English
Subjects:
Batteries
Composite materials
Conductivity
Differential scanning calorimetry
Electrolytes
Fourier transforms
Ion currents
Liquid crystals
Membranes
Micro-Raman
Photoelectrons
Polymers
Polymer–liquid crystal composite electrolyte membranes
Sodium-ion batteries
Thermal analysis and conductivity studies
X ray photoelectron spectroscopy
X-ray diffraction
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Summary:A novel PEO/E8 liquid crystal based composite solid polymer electrolyte membranes complexed with NaIO4 salt were prepared by the solution casting technique. The composite-salt complexations were examined by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, micro-Raman and X-ray photoelectron spectroscopy (XPS) studies. Differential scanning calorimetry (DSC) studies confirmed the decrease of percentage of crystalline portion in the matrix of electrolyte membranes upon that addition of NaIO4. The EIS studies evidenced for the increase of ionic conductivity of the electrolytes upon increase of NaIO4 concentration and in the present study, PEO/E8 electrolyte complexed with 10 wt% of NaIO4 demonstrated higher room temperature ionic conductivity of 1.05 × 10−7 S/cm. [Display omitted] •Polyethylene oxide/ E8 Liquid crystal based composite electrolyte membranes.•Enhancement of amorphous portion in the polymer matrix upon incorporation of micro sized E8 liquid crystal droplets.•Decrease of glass transition temperature and percentage of crystallinity are noticed as a function liquid crystal and salt.•PEO/E8 LC/NaIO4 (10 wt.%) electrolyte demonstrated relatively higher room temperature conductivity.
ISSN:0167-2738
1872-7689
DOI:10.1016/j.ssi.2019.02.021