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.

Enhanced dielectric performance and energy storage density of polymer/graphene nanocomposites prepared by dual fabrication

2018 ◽  
Vol 33 (2) ◽  
pp. 270-285 ◽  
Author(s):  
UO Uyor ◽  
API Popoola ◽  
OM Popoola ◽  
VS Aigbodion
Keyword(s):  
Energy Storage ◽  
Polymer Matrix ◽  
Vinylidene Fluoride ◽  
Energy Storage Materials ◽  
Energy Storage Density ◽  
Melt Mixing ◽  
Graphene Nanocomposites ◽  
Storage Density ◽  
Solution Blending ◽  
Dielectric Performance

Polymer/graphene nanocomposites (PGNs) have shown great potential as dielectric and energy storage materials. However, insolubility of graphene in most solvents, hydrophobic behaviour and poor dispersion in polymer matrix restrict wider fabrications and applications of PGNs. In this study, we present co-fabricated PGNs engineered by solution blending and melt compounding methods with improved dielectric performance. Further processing of PGNs by melt mixing after solution blending not only improved dispersion of graphene in the matrix but also ensured good interfacial interaction of the composites’ constituents and reduction of oxygen content in PGNs. Graphene nanoplatelets used in this study was slightly functionalized (fGNPs) to enhance dispersion in the polymer matrix. It was later characterized using Fourier transform infrared (FTIR) and Raman spectrometer. Scanning electron microscope (SEM) was used in morphological study of the fabricated composites. Dielectric properties, electrical conductivity, breakdown strength and energy storage capacity of the fabricated composites were investigated. The results obtained showed well-dispersed fGNPs in poly (vinylidene fluoride) (PVDF) matrix and improved dielectric performance. For instance, with 3.34 wt% and 6.67 wt% fGNPs co-fabricated composites, dielectric constant increased from about 9 for neat PVDF to 9930 and 38,418 at 100 Hz, respectively. While 7588 and 12,046 were respectively measured for solution blended-only composites at similar fGNPs content. These resulted to about 176.9% and 376.4% increase in energy storage density with 3.34 wt% and 6.67 wt% fGNPs co-fabricated composites when compared to their counterparts. These results were also credited to strong bonding, reduction of oxygen and recovered graphene structure by melt-mixing approach.

Sign in / Sign up

Export Citation Format

Share Document