Significant Improvements in Dielectric Constant and Energy Density of Ferroelectric Polymer Nanocomposites Enabled by Ultralow Contents of Nanofillers

2021 ◽  
pp. 2102392
Author(s):  
Li Li ◽  
Jingsai Cheng ◽  
Yunyun Cheng ◽  
Ting Han ◽  
Yang Liu ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Energy Density ◽  
Polymer Nanocomposites ◽  
Ferroelectric Polymer

scholarly journals Sandwich-structured polymer nanocomposites with high energy density and great charge–discharge efficiency at elevated temperatures

2016 ◽  
Vol 113 (36) ◽  
pp. 9995-10000 ◽  
Author(s):  
Qi Li ◽  
Feihua Liu ◽  
Tiannan Yang ◽  
Matthew R. Gadinski ◽  
Guangzu Zhang ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
High Temperature ◽  
Energy Density ◽  
Polymer Nanocomposites ◽  
Elevated Temperatures ◽  
High Energy ◽  
Operating Conditions ◽  
High Dielectric ◽  
Discharge Efficiency ◽  
Charge Discharge

The demand for a new generation of high-temperature dielectric materials toward capacitive energy storage has been driven by the rise of high-power applications such as electric vehicles, aircraft, and pulsed power systems where the power electronics are exposed to elevated temperatures. Polymer dielectrics are characterized by being lightweight, and their scalability, mechanical flexibility, high dielectric strength, and great reliability, but they are limited to relatively low operating temperatures. The existing polymer nanocomposite-based dielectrics with a limited energy density at high temperatures also present a major barrier to achieving significant reductions in size and weight of energy devices. Here we report the sandwich structures as an efficient route to high-temperature dielectric polymer nanocomposites that simultaneously possess high dielectric constant and low dielectric loss. In contrast to the conventional single-layer configuration, the rationally designed sandwich-structured polymer nanocomposites are capable of integrating the complementary properties of spatially organized multicomponents in a synergistic fashion to raise dielectric constant, and subsequently greatly improve discharged energy densities while retaining low loss and high charge–discharge efficiency at elevated temperatures. At 150 °C and 200 MV m−1, an operating condition toward electric vehicle applications, the sandwich-structured polymer nanocomposites outperform the state-of-the-art polymer-based dielectrics in terms of energy density, power density, charge–discharge efficiency, and cyclability. The excellent dielectric and capacitive properties of the polymer nanocomposites may pave a way for widespread applications in modern electronics and power modules where harsh operating conditions are present.

Exploration of dielectric constant dependence on evolution of microstructure in nanotube/ferroelectric polymer nanocomposites

2008 ◽  
Vol 92 (8) ◽  
pp. 082902 ◽  
Author(s):  
Sheng-Hong Yao ◽  
Zhi-Min Dang ◽  
Hai-Ping Xu ◽  
Mei-Juan Jiang ◽  
Jinbo Bai
Keyword(s):  
Dielectric Constant ◽  
Polymer Nanocomposites ◽  
Ferroelectric Polymer ◽  
Evolution Of Microstructure

Solution-processed ferroelectric terpolymer nanocomposites with high breakdown strength and energy density utilizing boron nitride nanosheets

2015 ◽  
Vol 8 (3) ◽  
pp. 922-931 ◽  
Author(s):  
Qi Li ◽  
Guangzu Zhang ◽  
Feihua Liu ◽  
Kuo Han ◽  
Matthew R. Gadinski ◽  
...  
Keyword(s):  
Energy Density ◽  
Boron Nitride ◽  
Polymer Nanocomposites ◽  
Breakdown Strength ◽  
Solution Processed ◽  
Boron Nitride Nanosheets ◽  
Ferroelectric Polymer ◽  
Charge Discharge

Ferroelectric polymer nanocomposites with boron nitride nanosheets exhibit greatly improved energy densities and higher charge–discharge efficiencies.

scholarly journals Polymer Nanocomposites with High Energy Density Utilizing Oriented Nanosheets and High-Dielectric-Constant Nanoparticles

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4780
Author(s):  
Yushu Li ◽  
Yao Zhou ◽  
Sang Cheng ◽  
Jun Hu ◽  
Jinliang He ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Energy Density ◽  
Polymer Nanocomposites ◽  
High Dielectric Constant ◽  
Vinylidene Fluoride ◽  
Dielectric Materials ◽  
High Energy ◽  
High Energy Density ◽  
Capacitive Energy Storage ◽  
High Dielectric

The development of high-energy-density electrostatic capacitors is critical to addressing the growing electricity need. Currently, the widely studied dielectric materials are polymer nanocomposites incorporated with high-dielectric-constant nanoparticles. However, the introduction of high-dielectric-constant nanoparticles can cause local electric field distortion and high leakage current, which limits the improvement in energy density. In this work, on the basis of conventional polymer nanocomposites containing high-dielectric-constant nanoparticles, oriented boron nitride nanosheets (BNNSs) are introduced as an extra filler phase. By changing the volume ratios of barium titanate (BT) and BNNSs, the dielectric property of polymer nanocomposites is adjusted, and thus the capacitive energy storage performance is optimized. Experimental results prove that the oriented BNNSs can suppress the propagation of charge carriers and decrease the conduction loss. Using poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) as the polymer matrix, the P(VDF-HFP)/BNNS/BT nanocomposite has a higher discharged energy density compared with the conventional nanocomposite with the freely dispersed BT nanoparticles.

Enhancement of breakdown strength and energy density in BaTiO3/ferroelectric polymer nanocomposites via processing-induced matrix crystallinity and uniformity

RSC Advances ◽  
2014 ◽  
Vol 4 (38) ◽  
pp. 19668-19673 ◽  
Author(s):  
Yunsang Kim ◽  
O'Neil L. Smith ◽  
Mohanalingam Kathaperumal ◽  
Lucas R. Johnstone ◽  
Ming-Jen Pan ◽  
...  
Keyword(s):  
Energy Density ◽  
Polymer Nanocomposites ◽  
Breakdown Strength ◽  
Ferroelectric Polymer ◽  
Blade Casting

Blade casting of BaTiO3/P(VDF-co-HFP) nanocomposites has improved morphology resulting in enhanced breakdown strength and energy density (7 J cm−3).

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