Volume 132, Issue 7
Article

Electrical, mechanical, structural, and thermal behaviors of polymeric gel electrolyte membranes of poly(vinylidene fluoride-co-hexafluoropropylene) with the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate plus lithium tetrafluoroborate

Shalu

Shalu

Department of Physics, Banaras Hindu University, Varanasi, 221005 India

Search for more papers by this author
Sujeet Kumar Chaurasia

Sujeet Kumar Chaurasia

Department of Physics, Banaras Hindu University, Varanasi, 221005 India

Search for more papers by this author
Rajendra Kumar Singh

Corresponding Author

Rajendra Kumar Singh

Department of Physics, Banaras Hindu University, Varanasi, 221005 India

Correspondence to: R. K. Singh (E-mail: [email protected])Search for more papers by this author
Suresh Chandra

Suresh Chandra

Department of Physics, Banaras Hindu University, Varanasi, 221005 India

Search for more papers by this author
First published: 22 September 2014
Citations: 40

ABSTRACT

Polymeric gel electrolyte membranes based on the polymer poly(vinylidene fluoride-co-hexafluoropropylene) [P(VdF–HFP)] with different weight percentages of the ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate plus 0.3M lithium tetrafluoroborate (LiBF4) salt were prepared and characterized by scanning electron microscopy, X-ray diffraction, differential scanning calorimetry, thermogravimetric analysis, Fourier transform infrared (FTIR) spectroscopy, complex impedance spectroscopy, pulse echo techniques, and Vickers hardness (H) testing. After the incorporation of the IL plus the salt solution in the P(VdF–HFP) polymer, the melting temperature, glass-transition temperature (Tg), degree of crystallinity, thermal stability, elastic modulus (E), and hardness (H) gradually decreased with increasing content of the IL–salt solution as a result of complexation between the P(VdF–HFP) and IL. This was confirmed by FTIR spectroscopy. A part of the IL and LiBF4 were found to remain uncomplexed as well. The ionic conductivity (σ) of the polymeric gel membranes was found to increase with increasing concentration of the IL–salt solution. The temperature-dependent σs of these polymeric gel membranes followed an Arrhenius-type thermally activated behavior. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41456.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.