Synergistically ultrahigh energy storage density and efficiency in designed sandwich-structured poly(vinylidene fluoride)-based flexible composite films induced by doping Na0.5Bi0.5TiO3 whiskers

2020 ◽  
Vol 8 (44) ◽  
pp. 23427-23435
Author(s):  
Ying Lin ◽  
Yongjing Zhang ◽  
Shili Zhan ◽  
Chuang Sun ◽  
Guangliang Hu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Vinylidene Fluoride ◽  
Composite Films ◽  
Energy Storage Density ◽  
Ultrahigh Energy ◽  
Storage Density ◽  
Poly Vinylidene Fluoride ◽  
Discharged Energy Density

Newly designed sandwich-structured poly(vinylidene fluoride)-based composite films with Na0.5Bi0.5TiO3 whiskers give rise to ultrahigh discharged energy density and efficiency.

The high energy density and efficiency of PVDF-based composites with double-shell Nd-BaTiO3 particles as fillers

2020 ◽  
Vol 13 (06) ◽  
pp. 2051042
Author(s):  
Zhong Yang ◽  
Jing Wang ◽  
Long He ◽  
Chaoyong Deng ◽  
Kongjun Zhu
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Vinylidene Fluoride ◽  
Composite Films ◽  
High Energy ◽  
Maximum Energy ◽  
Dielectric Constants ◽  
High Energy Density ◽  
Element Simulation ◽  
Poly Vinylidene Fluoride

Flexible dielectric capacitors are becoming shining stars in modern electronic devices. Ceramic particles with large dielectric constants and benign compatibility are attractive candidates to enhance the energy storage density of pristine polymer capacitors while guaranteeing their flexibility. In this work, double-shell structure of Al2O3 (AO) and dopamine (PDA) were successively coated on the Nd-doped BaTiO3 (NBT) particles and then introduced into the Poly(vinylidene fluoride) (PVDF) matrix. Obvious enhancement in dielectric constants was observed while the dielectric loss remained nearly constant. For the composite films with 1–4[Formula: see text]vol.% NBT@AO@PDA NPs, the maximum energy density of 9.1[Formula: see text]J/cm3 and energy efficiency of 65% was achieved at 430[Formula: see text]MV/m in the sample with 1[Formula: see text]vol.% filling ratio, which are 1.4 and 1.3 times larger than those of pristine PVDF at 450[Formula: see text]MV/m. The finite element simulation reveals the effective relief of the electric field concentration in the composite film induced by the AO and PDA layers. The greater improvement in the energy storage performance could be anticipated if the dispersity of NBT@AO@PDA NPs was further improved.

Highly enhanced dielectric strength and energy storage density in hydantoin@BaTiO3–P(VDF-HFP) composites with a sandwich-structure

RSC Advances ◽  
2015 ◽  
Vol 5 (65) ◽  
pp. 52809-52816 ◽  
Author(s):  
Hang Luo ◽  
Dou Zhang ◽  
Lu Wang ◽  
Chao Chen ◽  
Jing Zhou ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Sandwich Structure ◽  
Dielectric Strength ◽  
Energy Storage Density ◽  
Storage Density ◽  
Discharged Energy Density

The dielectric strength and discharged energy density are largely enhanced in the sandwich-structured hydantoin@BaTiO3–P(VDF-HFP) composites.

Construction of a 3D-BaTiO3 network leading to significantly enhanced dielectric permittivity and energy storage density of polymer composites

2017 ◽  
Vol 10 (1) ◽  
pp. 137-144 ◽  
Author(s):  
Suibin Luo ◽  
Yanbin Shen ◽  
Shuhui Yu ◽  
Yanjun Wan ◽  
Wei-Hsin Liao ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Dielectric Permittivity ◽  
Polymer Composites ◽  
Polymer Matrix ◽  
Energy Storage Density ◽  
Storage Density ◽  
Discharged Energy Density

The 3D-connected BaTiO3 network introduced into the polymer matrix improves polarization transmission and results in significantly enhanced permittivity and discharged energy density.

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.

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