Ultrahigh energy-density flexible dielectric films achieved by self-bundled polymer nanocluster in necklace-like arrangement

Chen, Zhuo; Shen, Zhonghui; Liu, Yang; Zhang, Yang; Yan, Shengliao; Feng, Rui; Zhao, Tingting; Zhao, Guizhe; Xiong, Chuanxi; Dong, Lijie

doi:10.1016/j.ensm.2020.07.031

Cited by 31 publications

(15 citation statements)

References 51 publications

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“…At the same time, due to the simultaneous increase of e r and E b , enhanced U e was obtained for these composite dielectrics with low content and wide bandgap nanoparticles. [91][92][93][94][95][96][97] This may be caused by the significantly enhanced dipole polarization of the matrix and large interface content accompanying the nano-sized particles. However, at present, the research on this type of composite is neither comprehensive nor in-depth, and a reasonable and perfect dielectric theory and model are to be urgently established.…”

Section: The Rising Importance Of the Interface In Polymer Nanodielec...mentioning

confidence: 99%

Perspective on interface engineering for capacitive energy storage polymer nanodielectrics

Xie

Fan

Zhang

et al. 2022

Phys. Chem. Chem. Phys.

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Section: The Rising Importance Of the Interface In Polymer Nanodielec...mentioning

confidence: 99%

Perspective on interface engineering for capacitive energy storage polymer nanodielectrics

Xie

Fan

Zhang

et al. 2022

Phys. Chem. Chem. Phys.

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“…For comparison, the η and E b values of some representative polymer matrix dielectric composites studied in the past 2 years are shown in Figure . ,− It should also be noted that in this work, we achieved a good E b and an excellent η and also systematically studied the application of PESU in the field of energy storage. Hopefully, this novel research might open up a new road to obtain dielectric nanocomposites with excellent performances for mass production.…”

Section: Resultsmentioning

confidence: 74%

Interesting Influence of Different Inorganic Particles on the Energy Storage Performance of a Polyethersulfone-Based Dielectric Composite

Zhang

Cong

et al. 2022

ACS Appl. Energy Mater.

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At present, dielectric capacitors have revealed large potential in the field of dielectric energy storage thanks to their advantages such as easy processing, flexibility, and long service life. Currently, a variety of methods have been proposed to prepare composite dielectrics with excellent comprehensive performance, which have the characteristics of great insulation strength, good flexibility, excellent efficiency, and large energy storage density. In this research, three composite dielectrics such as BT/PESU, BN/PESU, and TiO2/PESU are prepared by the solution casting method. Herein, we report that the incorporation of low contents of inorganic fillers into a linear polymer leads to concurrent enhancements in both permittivity and breakdown strength. The composite material is conducive to the lightweight nature and miniaturization of dielectric capacitors and at the same time promotes the development of electrical energy storage and conversion devices. The linear dielectric material polyethersulfone (PESU) is selected as the matrix, and it is planned to retain the characteristics of excellent insulation strength and small tanδ of PESU. In addition, by introducing inorganic filler phases with different particle sizes and dielectric constants, the microstructure of the composite material can be adjusted and the macroscopic properties of the composite material can be improved. At last, through comparison, a polymer-based dielectric composite with excellent breakdown strength and energy storage performance was successfully achieved. Fortunately, the discharge energy density of the 1 wt % TiO2/PESU dielectric composite reaches 7 J/cm3 at 570 kV/mm, and its charge–discharge efficiency reaches 87%. This work paves a broad road for the research and development of energy storage materials in the field of dielectric capacitors with high energy storage density, high efficiency, and excellent breakdown strength.

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“…Although the breakdown simulation has been used frequently to predict the breakdown path development of polymer‐based composites, due to the diversification of models and approaches, it is necessary to verify the accuracy of a model before using it. [ 35 , 36 , 37 , 38 ] The stochastic breakdown simulation of the PI/Al 2 O 3 composites (1, 3, 5, 7, 9 vol%) were carried out, the size of Al 2 O 3 was set at 50 nm. The simulation results are close to the results in the published literature, the E b of the PI/Al 2 O 3 composites increases first and then decreases in Figure S2 (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Prediction of Energy Storage Performance in Polymer Composites Using High‐Throughput Stochastic Breakdown Simulation and Machine Learning

et al. 2022

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Polymer dielectric capacitors are widely utilized in pulse power devices owing to their high power density. Because of the low dielectric constants of pure polymers, inorganic fillers are needed to improve their properties. The size and dielectric properties of fillers will affect the dielectric breakdown of polymer‐based composites. However, the effect of fillers on breakdown strength cannot be completely obtained through experiments alone. In this paper, three of the most important variables affecting the breakdown strength of polymer‐based composites are considered: the filler dielectric constants, filler sizes, and filler contents. High‐throughput stochastic breakdown simulation is performed on 504 groups of data, and the simulation results are used as the machine learning database to obtain the breakdown strength prediction of polymer‐based composites. Combined with the classical dielectric prediction formula, the energy storage density prediction of polymer‐based composites is obtained. The accuracy of the prediction is verified by the directional experiments, including dielectric constant and breakdown strength. This work provides insight into the design and fabrication of polymer‐based composites with high energy density for capacitive energy storage applications.

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Ultrahigh energy-density flexible dielectric films achieved by self-bundled polymer nanocluster in necklace-like arrangement

Cited by 31 publications

References 51 publications

Perspective on interface engineering for capacitive energy storage polymer nanodielectrics

Perspective on interface engineering for capacitive energy storage polymer nanodielectrics

Interesting Influence of Different Inorganic Particles on the Energy Storage Performance of a Polyethersulfone-Based Dielectric Composite

Prediction of Energy Storage Performance in Polymer Composites Using High‐Throughput Stochastic Breakdown Simulation and Machine Learning

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