Graphene derivative based high dielectric constant polymer composite electrodes for supercapacitors. (2021)

• Record Type: Journal Article
• Authors: Srivastava, Nisha; Patodia, Tarun; Yadav, Anju; Yadav, Dinesh; Jakhar, Narendra; Sharma, K.B.; Tripathi, Balram
• Is Part Of: Materials today. Volume 42:Part 4(2021)
• Page Start: 1657
• Page End: 1660
• Publication Date: 2021
• Subjects: GO & rGO/PVDF composites -- Structure & bonding -- Dielectric constant -- Supercapacitor -- SEM; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2020.07.533
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: Graphene oxide (GO) and reduced graphene oxide (rGO) based polyvinylidene fluoride (PVDF) flexible composites were prepared using GO and rGO fillers in PVDF matrix by solution casting method. These composites were characterized with X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, Impedance analyzer (dielectric constant) and Field emission electron microscopy (FE-SEM). The dielectric constants at 1 MHz frequency for PVDF, 5%GO/PVDF and 5% rGO/PVDF composites were obtained 3.68, 12.20 & 30.32 respectively, ascribed to Maxwell-Wagner-Sillars (MWS) polarization mechanism and the exchange coupling at the surface and interface. According to MWS polarization charges could be accumulated at the interface when an external field was acted on composites due to heterogeneous response of GO, rGO and PVDF attributed alternate of electrode materials for superacapacitors.