scholarly journals Enhanced dielectric properties of surface hydroxylated bismuth ferrite–Poly (vinylidene fluoride-co-hexafluoropropylene) composites for energy storage devices

2016 ◽  
Vol 1 (4) ◽  
pp. 461-467 ◽  
Author(s):  
Srikanta Moharana ◽  
Mukesh K. Mishra ◽  
M. Chopkar ◽  
R.N. Mahaling
Keyword(s):  
Energy Storage ◽  
Dielectric Properties ◽  
Vinylidene Fluoride ◽  
Bismuth Ferrite ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Poly Vinylidene Fluoride

scholarly journals Dielectric Properties of Graphene/Titania/Polyvinylidene Fluoride (G/TiO2/PVDF) Nanocomposites

Materials ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 205 ◽  
Author(s):  
Saira Ishaq ◽  
Farah Kanwal ◽  
Shahid Atiq ◽  
Mahmoud Moussa ◽  
Umar Azhar ◽  
...  
Keyword(s):  
Energy Storage ◽  
Dielectric Properties ◽  
Flexible Electronics ◽  
Polyvinylidene Fluoride ◽  
Dielectric Material ◽  
Gravimetric Analysis ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Anatase Titania ◽  
Prepared Material

Flexible electronics have gained eminent importance in recent years due to their high mechanical strength and resistance to environmental conditions, along with their effective energy storage and energy generating abilities. In this work, graphene/ceramic/polymer based flexible dielectric nanocomposites have been prepared and their dielectric properties were characterized. The composite was formulated by combining graphene with rutile and anatase titania, and polyvinylidene fluoride in different weight ratios to achieve optimized dielectric properties and flexibility. After preparation, composites were characterized for their morphologies, structures, functional groups, thermal stability and dielectric characterizations by using scanning electron microscopy, X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, thermal gravimetric analysis and impedance spectroscopy. Dielectric results showed that prepared flexible composite exhibited dielectric constant of 70.4 with minor leakage current (tanδ) i.e., 0.39 at 100 Hz. These results were further confirmed by calculating alternating current (AC) conductivity and electric modulus which ensured that prepared material is efficient dielectric material which may be employed in electronic industry for development of next generation flexible energy storage devices.

scholarly journals Electron-Beam Irradiation for Boosting Storage Energy Density of Tuned Poly(vinylidene fluoride-hexafluoropropylene)/Graphene Nanoplatelet Polymer Composites

Crystals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 633
Author(s):  
Ardian Agus Permana ◽  
Somyot Chirasatitsin ◽  
Chatchai Putson
Keyword(s):  
Electron Beam ◽  
Energy Storage ◽  
Dielectric Properties ◽  
Vinylidene Fluoride ◽  
Graphene Nanoplatelets ◽  
Energy Storage Materials ◽  
Energy Storage Density ◽  
Storage Density ◽  
Storage Materials ◽  
Poly Vinylidene Fluoride

In current, the energy storage materials based on electrets and ferroelectric polymers are urgently demanded for electric power supply and renewable energy applications. The high energy storage density can be enhanced by conducting or inorganic fillers to ferroelectric polymer matrix. However, agglomeration, phase separation of fillers, interfacial phase regions and crystallinity of matrix remain the main factors for the improvement of energy storage density in those composites. Poly(vinylidene fluoride-hexafluoropropylene) was modified with graphene nanoplatelets for enhanced the dielectric properties and energy storage density, which combines the irradiated by electron beam. Tuning effect of the crystalline regions and polar phases with graphene nanoplatelets and electron irradiation on its surface, structure, electrical and energy storage properties were observed. The film homogeneity was increased by reducing the pores, along with the improvement of surface roughness and hydrophobicity, which related with the dielectric properties and energy storage density. The β-phase fraction and crystallinity improvement significantly affect electrical properties by improving polarization and dielectric constant. As a core, electron beam dramatically reduce the crystals size by two times. Hence, energy storage density of composites was enhanced, while energy loss was reduced under operating conditions. Results on the improvement of energy efficiency were from 68.11 to 74.66% for neat poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)), much higher than previously reported of 58%, and doubled for P(VDF-HFP)/GNPs composites which will be discussed and evaluated for the practical energy storage materials.

Enhancement of dielectric properties and energy storage density in poly(vinylidene fluoride-co-hexafluoropropylene) by relaxor ferroelectric ceramics

RSC Advances ◽  
2015 ◽  
Vol 5 (84) ◽  
pp. 68515-68522 ◽  
Author(s):  
Hang Luo ◽  
Chao Chen ◽  
Kechao Zhou ◽  
Xuefan Zhou ◽  
Zhong Wu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Dielectric Properties ◽  
Vinylidene Fluoride ◽  
Ferroelectric Ceramic ◽  
Relaxor Ferroelectric ◽  
Ferroelectric Ceramics ◽  
Energy Storage Density ◽  
Storage Density ◽  
Poly Vinylidene Fluoride ◽  
Relaxor Ferroelectric Ceramics

The dielectric properties and energy storage density of poly(vinylidene fluoride-co-hexafluoropropylene) were enhanced by the surface-functionalized relaxor ferroelectric ceramic Pb(Mg1/3Nb2/3)O3–PbTiO3.

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