Ultrahigh Energy Density of Poly(vinylidene fluoride) from Synergistically Improved Dielectric Constant and Withstand Voltage by Tuning Crystallization Behavior

2021 ◽  
Author(s):  
Ru Guo ◽  
Hang Luo ◽  
Xuefan Zhou ◽  
Zhida Xiao ◽  
Haoran Xie ◽  
...  
Keyword(s):  
Energy Density ◽  
Polymer Nanocomposites ◽  
Crystallization Behavior ◽  
Vinylidene Fluoride ◽  
High Energy ◽  
Pulsed Power ◽  
High Energy Density ◽  
Ultrahigh Energy ◽  
Poly Vinylidene Fluoride ◽  
The Common

Capacitor dielectrics with high energy density are urgently-needed in power electronics and pulsed power system applications. Up to date, the most focused ceramic/polymer nanocomposites still suffer from the common contradictory...

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.

High-field antiferroelectric-like behavior in uniaxially stretched poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene)-grafted-poly(methyl methacrylate) films with high energy density

RSC Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 1589-1599 ◽  
Author(s):  
Honghong Gong ◽  
Bei Miao ◽  
Xiao Zhang ◽  
Junyong Lu ◽  
Zhicheng Zhang
Keyword(s):  
Energy Density ◽  
Methyl Methacrylate ◽  
High Field ◽  
Vinylidene Fluoride ◽  
Breakdown Strength ◽  
High Energy ◽  
High Energy Density ◽  
Poly Methyl Methacrylate ◽  
Poly Vinylidene Fluoride ◽  
Discharged Energy Density

The antiferroelectric-like behavior could be retained up to 675 MV m−1 with a discharged energy density of 23.3 J cm−3 because of the confinement of rigid PMMA segment onto the ferroelectric relaxation of P(VDF-TrFE-CTFE) and the high breakdown strength.

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