High-temperature dielectric polymer nanocomposites with interposed montmorillonite nanosheets

“…interposed 2D montmorillonite nanosheets in sandwich‐structured barium titanate/polyamide‐imide film and found that due to the anisotropy of the nanosheets, the conductive currents through the positive and negative levels were suppressed and the efficiency at 150 °C was improved. [ 234 ]…”

Section: Superiority Of Multilayer Structure Dielectric For Energy Storagementioning

confidence: 99%

Recent Advances in Multilayer‐Structure Dielectrics for Energy Storage Application

et al. 2021

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An electrostatic capacitor has been widely used in many fields (such as high pulsed power technology, new energy vehicles, etc.) due to its ultrahigh discharge power density. Remarkable progress has been made over the past 10 years by doping ferroelectric ceramics into polymers because the dielectric constant is positively correlated with the energy storage density. However, this method often leads to an increase in dielectric loss and a decrease in energy storage efficiency. Therefore, the way of using a multilayer structure to improve the energy storage density of the dielectric has attracted the attention of researchers. Although research on energy storage properties using multilayer dielectric is just beginning, it shows the excellent effect and huge potential. In this review, the main physical mechanisms of polarization, breakdown and energy storage in multilayer structure dielectric are introduced, the theoretical simulation and experimental results are systematically summarized, and the preparation methods and design ideas of multilayer structure dielectrics are mainly described. This article covers not only an overview of the state-of-the-art advances of multilayer structure energy storage dielectric but also the prospects that may open another window to tune the electrical performance of the electrostatic capacitor via designing a multilayer structure.

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“…[12][13][14] However, the low energy storage density of PP limits its wide application due to its small dielectric constant. [2,15,16] It is well known that for linear dielectric materials, U e ¼ 1=2ε 0 ε r E b 2 , where U e , E b , ε r , and ε 0 represent energy storage density, breakdown strength, dielectric constant, and vacuum dielectric constant, respectively (ε 0 = 8.85 Â 10 À12 F/m). And either the increase of breakdown strength or the increase of dielectric constant has a positive effect on the improvement of energy storage density.…”

Section: Introductionmentioning

confidence: 99%

Enhanced dielectric and energy storage properties of polypropylene by high‐energy electron beam irradiation

Zhao

Xie

et al. 2022

Polymer Engineering & Sci

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In this work, electron beam irradiation technology was used to increase the dielectric and energy storage performance of polypropylene (PP) films. Electron beam irradiation makes no difference on the crystal morphology but decreased the crystallinity and crystal size of PP. Besides, irradiation improved the thermal stability and polarity of PP. The irradiated PP films behaved much higher dielectric constant than pure PP films. Actually, the dielectric constant of the irradiated PP with 30 kGy was 3.98, while the dielectric constant of pristine PP was only 2.8. Furthermore, the irradiated PP films still kept low dielectric loss and AC conductivity. Weibull distribution test results proved electron beam irradiation improved the breakdown strength of PP films. The discharged energy storage of PP films increased from 1.3 J/cm3 of pristine PP film to 3.6 J/cm3 of irradiated PP with 30 kGy film. Moreover, the PP film irradiated with 30 kGy displayed an excellent charge–discharge efficiency of more than 95%. This research provides an easy and practical approach to investigate dielectric PP material for energy storage.

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High-temperature dielectric polymer nanocomposites with interposed montmorillonite nanosheets

Cited by 70 publications

References 41 publications

Dielectric polymers for high-temperature capacitive energy storage

Dielectric polymers for high-temperature capacitive energy storage

Recent Advances in Multilayer‐Structure Dielectrics for Energy Storage Application

Enhanced dielectric and energy storage properties of polypropylene by high‐energy electron beam irradiation

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