A novel polyvinyl alcohol/polyethylene glycol (PVA/PEG) polymeric blend doped with graphene oxide for energy storage devices | ||||
| ERU Research Journal | ||||
| Volume 3, Issue 1, January 2024, Page 771-780 PDF (299.2 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/erurj.2024.214106.1036 | ||||
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| Authors | ||||
Dalia Refaat  1; Emad Mosa2; Mohamed Fikry 2; Magdy Omar2
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| 1Mathematical and Natural Science Department, Faculty of Engineering, Egyptian Russian University, Cairo, Egypt | ||||
| 2Physics Department, Faculty of Science, Cairo University, Egypt | ||||
| Abstract | ||||
| A developed polyvinyl alcohol/polyethylene glycol (PVA/PEG) blend containing different concentrations of graphene oxide GO (PVA/PEG-GO) as dialectic materials for energy storage devices was studied. 80 wt% of PVA/ 20 wt% of PEG were doped with 0.5, 1.5, and 3 wt% of graphene oxide and prepared using the solution casting technique. The electrical properties, the dielectric constant (𝜺'), dielectric loss (𝜺"), and ac conductivity (σac), in a wide range of frequencies, were extensively investigated. The GO strongly enhanced the dielectric constant (energy storage) of the produced PVA/PEG blend, while a little variation was observed in dielectric loss (energy loss). A higher frequency shift was observed in the loss tangent peak, reflecting an augmentation in the mobility speed of the ions, causing a longer relaxation time. In response to the electric field, the charge carriers’ mobility has a short range. The addition of GO caused a reduction in the semicircle diameter of a Cole-Cole profile. The ac conductivity was found to obey the power law, and the ionic conduction dominates the conductivity in all the studied frequency ranges. The produced PVA/PEG-GO blends had significant energy storage characteristics, making them an excellent choice for dielectric materials in energy storage devices. | ||||
| Keywords | ||||
| Energy storage; Supercapacitor; Dielectric properties; Graphene oxide; PVA/PEG polymer | ||||
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