Graphene-filled versus ionic liquid-filled poly(vinylidene fluoride-co-hexafluoropropene) electrolytic membranes for high energy devices: thermophysical and electrochemical aspects
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The recent developments of membrane technology that requires the composite membrane to work effectively in high energy devices have prompted the inclusion of graphene (GO) and N-butyltrimethylammonium iodide (IL) into a poly(vinylidene fluoride-co-hexafluoropropene) (PVDF-co-HFP) host polymer. From the characterizations that were conducted using FTIR, SEM, TGA, DSC, universal testing machine, Hot Disk Thermal Constants Analyser and the RF impedance spectroscopy, the IL-filled PVDF-co-HFP membrane (1P/IL) was found to have a better dielectric and thermal conductivity, while the decreased porosity of the 1P/GO membrane was discovered to have contributed to its better mechanical performance. Apart from the moieties, which had filled the gaps of the porous architecture and formed a firmer configuration from the chemical junctions with the PVDF-co-HFP, the IL in the membrane was also observed to have increased the density of the accumulated charge carriers and polarization with a better crystallinity control, porosity and ion transportation of the dielectric constant. Based on the above results, the introduction of an ionic liquid (with its plasticizing effect, well-dispersed assembling and diffusional motions) can thus be regarded as significantly improving the properties of the PVDF-co-HFP and particularly in the hi-tech targeted applications of high energy devices such as those of the high-energy Li-ion batteries.
KeywordsPVDF-co-HFP Graphene N-Butyltrimethylammonium iodide Thermal stability and electrical conductivity Mechanical and dielectric performance
This research is supported by the School of Material and Mineral Source Engineering, Universiti Sains Malaysia under the project Grant of FRGS-203/PBAHAN-6071337.
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Conflict of interest
The authors declare no conflict of interest
- 3.Nonjola PT, Mutangwa N, Luo H (2016) In: Ozoemena KI, Chen S (eds) Nanomaterials in advanced batteries and supercapacitors. Springer, BaselGoogle Scholar
- 4.Liew CW, Ramesh S (2016) In: Visakh PM, Nazarenko O (eds) Nanostructured polymer membranes, volume 1: processing and characterization. Wiley, New JerseyGoogle Scholar
- 16.Flory PJ (1953) Principles of polymer chemistry. Cornell University Press, New YorkGoogle Scholar
- 30.Abbrent S, Greenbaum S, Peled E, Golodnitsky D (2015) In: Jagjit N (ed) Handbook of solid state batteries, 2nd edn. World Scientific, New JerseyGoogle Scholar