Giant permittivity materials with low dielectric loss over a broad temperature range enabled by weakening intermolecular hydrogen bonds

Zhang, Qiyan; Chen, Xin; Zhang, Tian; Zhang, Q.M.

doi:10.1016/j.nanoen.2019.103916

Cited by 43 publications

(32 citation statements)

References 26 publications

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“…Another work by Zhang and coworkers suggests that the polymer blending strategy is also applicable to other high T g dipolar polymers, e.g., PEI and poly(ether-methyl-ether-urea) (PEMEU). 206 The PEI/PEMEU blend shows a high K of 5.8 and a low tan  of below 1% over a wide temperature range up to 150 °C . The increased K in PEI/PEMEU blend is attributed to the disruption of hydrogen bonds and improved free volume for dipoles in the glassy state.…”

Section: Dielectric Polymer Blendsmentioning

confidence: 94%

Dielectric polymers for high-temperature capacitive energy storage

et al. 2021

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Section: Dielectric Polymer Blendsmentioning

confidence: 94%

Dielectric polymers for high-temperature capacitive energy storage

et al. 2021

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“…Meanwhile it demonstrated excellent dielectric properties over a wide temperature range (−70 °C to 150 °C) ( Figure 3 c,d). However, the breakdown and energy storage properties of PEI at high temperatures have not been studied [ 62 ].…”

Section: Linear Polymer Dielectricsmentioning

confidence: 99%

“…( c ) the relationship between dielectric constant and blend composition (weight ratio of PEI: PEMEU) at 1 kHz; ( d ) The dielectric properties of a 1:1 mixture of PEI and PEMEU vary with temperature at different frequencies. Reprinted with permission from [ 62 ]. Copyright (2019), Elsevier.…”

Section: Linear Polymer Dielectricsmentioning

confidence: 99%

Energy Storage Application of All-Organic Polymer Dielectrics: A Review

et al. 2022

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With the wide application of energy storage equipment in modern electronic and electrical systems, developing polymer-based dielectric capacitors with high-power density and rapid charge and discharge capabilities has become important. However, there are significant challenges in synergistic optimization of conventional polymer-based composites, specifically in terms of their breakdown and dielectric properties. As the basis of dielectrics, all-organic polymers have become a research hotspot in recent years, showing broad development prospects in the fields of dielectric and energy storage. This paper reviews the research progress of all-organic polymer dielectrics from the perspective of material preparation methods, with emphasis on strategies that enhance both dielectric and energy storage performance. By dividing all-organic polymer dielectrics into linear polymer dielectrics and nonlinear polymer dielectrics, the paper describes the effects of three structures (blending, filling, and multilayer) on the dielectric and energy storage properties of all-organic polymer dielectrics. Based on the above research progress, the energy storage applications of all-organic dielectrics are summarized and their prospects discussed.

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“…Employment of renewable energy as an alternative to conventional fossils based energy sources is restricted by energy storage and its on-demand utilization. − Now researchers are tasked to develop state-of-the-art energy storage devices with minimal energy losses to help substitute fossil-fuel-based energy sources with renewable energy sources for the betterment of the environment . Commonly existing energy storage devices available now are batteries, dielectric capacitors, and electrochemical supercapacitors. ,, Superior attributes such as ultrahigh power density, long cycle lifetime, and fast charge–discharge rate make dielectric capacitors strong candidates to be employed in pulsed power systems. − However, flexible film dielectric materials have a low energy density. Therefore, it is important to improve their energy density in order to utilize them as energy storage devices (ESDs). − …”

Section: Introductionmentioning

confidence: 99%

Significant Energy Density of Discharge and Charge–Discharge Efficiency in Ag@BNN Nanofillers-Modified Heterogeneous Sandwich Structure Nanocomposites

Marwat

Yasar

et al. 2020

ACS Appl. Energy Mater.

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The development of innovative dielectrics by considerably improving their energy densities of discharge is important for current electronic power systems. We present here newly designed heterogeneous sandwich structure nanocomposites (i.e., P(VDF-HFP)-xwt%Ag@BN nanosheets (Ag@ BNN)/PEI-P(VDF-HFP)). The outer ferroelectric-type P(VDF-HFP) layers enhanced the dielectric displacement, while PEI reduced the losses due to its linear characteristic. Besides, the use of Ag@BNN as nanofillers improved the dielectric displacement, as well as breakdown strength. Consequently, the ideal sandwich structure achieved a significant energy density of 11.3 J/cm 3 and decent charge−discharge efficiency of 80% at about 510 MV/m. This discharge energy density is the highest reported until now when charge−discharge efficiency of ≥80% is considered as the threshold. In-depth analysis revealed that comparatively higher D max − D r (i.e., 4.7 μC/cm 2 ), as well as the utmost breakdown strength (i.e., 510 MV/m), assisted in achieving this relatively higher discharge energy density. The finite element simulation demonstrated the efficacy of using Ag@BNN over BNN as nanofillers; i.e., it showed diverged electric field vectors near Ag nanoparticles, optimum electric field distribution between the sandwich structure layers, and improved dielectric displacement, in comparison with unmodified BNNs. The ideal sandwich structure also showed a short discharge time of 9.02 μs, a high power density of 0.165 MW/cm 3 , and an excellent lifetime until 40 000 cycles. This study shows that heterogeneous sandwich-structured nanocomposites with a surface decorated Ag@BNN nanofillers can be used in advanced dielectrics and pulsed power devices.

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Giant permittivity materials with low dielectric loss over a broad temperature range enabled by weakening intermolecular hydrogen bonds

Cited by 43 publications

References 26 publications

Dielectric polymers for high-temperature capacitive energy storage

Dielectric polymers for high-temperature capacitive energy storage

Energy Storage Application of All-Organic Polymer Dielectrics: A Review

Significant Energy Density of Discharge and Charge–Discharge Efficiency in Ag@BNN Nanofillers-Modified Heterogeneous Sandwich Structure Nanocomposites

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