High energy density and discharge efficiency polypropylene nanocomposites for potential high-power capacitor

Liu, Biao; Yang, Minhao; Zhou, Wenying; Cai, Huiwu; Zhong, Shao‐Long; Zheng, Ming‐Sheng; Dang, Zhi‐Min

doi:10.1016/j.ensm.2019.12.006

Cited by 137 publications

(71 citation statements)

References 41 publications

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“…Remarkably, the Ue of 4.43 J/cm 3 obtained in the bilayered nanocomposite, is not only ~112% and ~71% greater than pristine polymer (2.09 J/cm 3 ) and the single-layered nanocomposite (2.59 J/cm 3 ) but also among the best of the nanocomposites based on linear polymer matrices (e.g., 3.86 J/cm 3 of PP-based and 4.1 J/cm 3 in PS-based nanocomposite) reported so far (Figure 4(e)). 22,[29][30][31][32][53][54][55][56] To evaluate the discharge rate of the polymer nanocomposite, fast discharge test has been conducted using a typical high-speed capacitor circuit at identical resistor-capacitor (RC) time constant. The power density (P) of dielectric materials is derived from the following equation…”

Section: Energy Storage Performancementioning

confidence: 99%

Bilayer-Structured Polymer Nanocomposites Exhibiting High Breakdown Strength and Energy Density via Interfacial Barrier Design

Yao

Zhou

et al. 2020

ACS Appl. Energy Mater.

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The development of advanced dielectric materials with high breakdown strength, high dischargeable energy densities and great efficiencies is imperative to meet the ever-increasing demand of modern power systems and electronic devices. Herein, we present the layer-by-layer solution prepared bilayer-structured nanocomposite films with much enhanced capacitive performance via resolving the typical paradox between dielectric constant and breakdown strength in dielectric materials. The bilayered nanocomposite films are composed of Al2O3 dispersed in polystyrene as the interfacial barrier layer to inhibit electrical conduction and the polystyrene layer with TiO2 to enhance dielectric constant. The resulting layered film exhibits a discharged energy density of 4.43 J/cm 3 along with ultrahigh charge-discharge efficiencies of > 90%, which is among the highest energy densities ever achieved in the polystyrene-based dielectric polymer nanocomposites. In addition, the composite films show outstanding cyclic stability under high electric fields, which would enable the long-term efficient operation of film capacitors. This contribution represents an efficient route to high-energy-density dielectric composite materials using interfacial barrier architectures.

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Section: Energy Storage Performancementioning

confidence: 99%

Bilayer-Structured Polymer Nanocomposites Exhibiting High Breakdown Strength and Energy Density via Interfacial Barrier Design

Yao

Zhou

et al. 2020

ACS Appl. Energy Mater.

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“…However, some problems such us a decreased breakdown strength have been detected when nanofillers are aggregated [ 14 ] that has questioned their reliability and applications. To avoid agglomeration, nanofillers are modified using chemical coupling agent, which improves the dispersion of the nanofiller considerably [ 15 ]. Different surface modification strategies for the amelioration of nanofiller dispersion in the polymer matrix have been intensively attempted by linking the small organic molecules or long polymeric chains on the surface of nanofillers [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…To avoid agglomeration, nanofillers are modified using chemical coupling agent, which improves the dispersion of the nanofiller considerably [ 15 ]. Different surface modification strategies for the amelioration of nanofiller dispersion in the polymer matrix have been intensively attempted by linking the small organic molecules or long polymeric chains on the surface of nanofillers [ 15 , 16 ]. Another important factor is the concentration of fillers due to the trade-off between the difficulty in film processing and the enhancement of dielectric properties [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

An Improved Physical-Stochastic Model for Simulating Electrical Tree Propagation in Solid Polymeric Dielectrics

2020

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The dielectric breakdown of solid polymeric materials is due to the inception and propagation of electrical trees inside them. The remaining useful life of the solid dielectrics could be determined using propagation simulations correlated with non-intrusive measurements such as partial discharges (PD). This paper presents a brief review of the different models for simulating electrical tree propagation in solid dielectrics. A novel improved physical-stochastic model is proposed, which allows quantitatively and qualitatively analyzing the electrical tree propagation process in polymeric dielectrics. Simulation results exhibit good agreement with measurements presented in the literature. It is concluded that the model allows adequately predicting the tree propagation behavior and additional experimental analyses are required in order to improve the model accuracy.

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“…However, PVDF, as a ferroelectric polymer, exhibits low energy efficiency. So many methods have been used to enhance the energy efficiency of composite films such as quenching in ice water, 21 fabricating multilayer strctures 22,23 or using a non‐ferroelectric polymer as matrix 24 . The quenching process is used in the present work to improve the energy efficiency of composites.…”

Section: Introductionmentioning

confidence: 99%

“…So many methods have been used to enhance the energy efficiency of composite films such as quenching in ice water, 21 fabricating multilayer strctures 22,23 or using a nonferroelectric polymer as matrix. 24 The quenching process is used in the present work to improve the energy efficiency of composites. As a potential alternative for lead-based ceramics, (K 0.5 Na 0.5 )NbO 3 (KNN) is widely used in recent decades on account of its relatively good comprehensive properties including high Curie temperature, good temperature stability, high piezoelectric coefficient, large electromechanical coupling factor and high saturated polarization.…”

mentioning

confidence: 99%

Enhanced discharged energy density in poly(vinylidene fluoride) composites with a small loading of ( K ₀ _. ₅ Na ₀ _.5 ) NbO ₃ particles

Lin

Chen

et al. 2020

Int J Energy Res

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Summary Dielectric composites are regarded as potential energy storage materials for electric power systems and advanced electronics because of the tunable permittivity, excellent flexibility, and high electric breakdown strengths. However, for the moment, it is still a challenge to fabricate dielectric composites combining large electrical breakdown strength and high discharged energy density. Ferroelectric (K0.5Na0.5)NbO3 (KNN) particles are fabricated by solid‐state reaction and introduced into poly(vinylidene fluoride) to improve energy storage capability. Particularly, the properties such as dielectric constant (εr), electric displacement, breakdown strength (Eb) and discharged energy density (Udis) are enhanced with the introduction of KNN particles. The composite containing 3 vol% KNN particles exhibits an ultrahigh Udis of 14.70 J·cm−3 at 480 kV·mm−1, which is approximately three times that of pure PVDF of 4.80 J·cm−3 at the applied electric field of 350 kV·mm−1. This research is of critical significance for proposing a convenient and effective way to design high discharged energy storage dielectric composites for future flexible portable capacitors. Keywords: dielectric composite, (K0.5Na0.5)NbO3 particle, breakdown strength, discharged energy density.

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High energy density and discharge efficiency polypropylene nanocomposites for potential high-power capacitor

Cited by 137 publications

References 41 publications

Bilayer-Structured Polymer Nanocomposites Exhibiting High Breakdown Strength and Energy Density via Interfacial Barrier Design

Bilayer-Structured Polymer Nanocomposites Exhibiting High Breakdown Strength and Energy Density via Interfacial Barrier Design

An Improved Physical-Stochastic Model for Simulating Electrical Tree Propagation in Solid Polymeric Dielectrics

Enhanced discharged energy density in poly(vinylidene fluoride) composites with a small loading of ( K ₀ _. ₅ Na ₀ _.5 ) NbO ₃ particles

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High energy density and discharge efficiency polypropylene nanocomposites for potential high-power capacitor

Cited by 137 publications

References 41 publications

Bilayer-Structured Polymer Nanocomposites Exhibiting High Breakdown Strength and Energy Density via Interfacial Barrier Design

Bilayer-Structured Polymer Nanocomposites Exhibiting High Breakdown Strength and Energy Density via Interfacial Barrier Design

An Improved Physical-Stochastic Model for Simulating Electrical Tree Propagation in Solid Polymeric Dielectrics

Enhanced discharged energy density in poly(vinylidene fluoride) composites with a small loading of ( K 0 . 5 Na 0 .5 ) NbO 3 particles

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Enhanced discharged energy density in poly(vinylidene fluoride) composites with a small loading of ( K ₀ _. ₅ Na ₀ _.5 ) NbO ₃ particles