Polymer dielectrics exhibiting an anomalously improved dielectric constant simultaneously achieved high energy density and efficiency enabled by CdSe/Cd<sub>1−x</sub>Zn<sub>x</sub>S quantum dots

Li, Li; Cheng, Jingsai; Cheng, Yi; Han, Ting; Liang, Xiao; Zhao, Yan; Zhao, Guanghui; Dong, Lijie

doi:10.1039/d0ta02760j

Cited by 27 publications

(14 citation statements)

References 56 publications

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“…Even more impressively, an ultrahigh η of 83.4% at 700 MV m −1 is achieved in the solution-processed P(VDF-HFP) composite with Al 2 O 3 NPLs. To our knowledge, this value not only far exceeds those obtained in solution-processed ferroelectric polymer nanocomposites (Figure4c,d)[25,26,35,[50][51][52][53][54][55][56][57][58][59][60][61] but also outperforms the highest values of the ferroelectric polymer nanocomposites prepared by complicated procedures, including electrostatic spinning of composite precursors,[30][31][32]40] post-synthetic modification of nanostructured fillers,[33,34,36] and mechanical press of multi-layered films processes with multiple steps,[33,62] as summarized in TableS4, Supporting Information. Intriguingly, as summarized in Figure4c, the ferroelectric polymer nanocomposites containing low-K fillers such as BNNS with K composite /K matrix <1 normally exhibit η of <78%,[25] whereas the nanocomposites loaded with high-K fillers such as BaTiO 3 with K composite /K matrix value >1 generally have η of <70% [50][51][52]58].…”

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confidence: 54%

“…d) Comparison of the maximized U e and the corresponding η of the solution-processed ferroelectric polymer nanocomposites. [25,[51][52][53][54]56,59,61] . BOPP data are derived from the authors' previous work.…”

Section: Ferroelectric Polymer Composites With 2d Nanofillersmentioning

confidence: 99%

“…BST, barium strontium titanate; BT, barium titanate; P(VDF-CTFE), poly(vinylidene fluoride-co-chlorotrifluoroethylene); P(VDF-TrFE-CFE), poly(vinylidene fuoride-ter-triuoroethylene-terchlorouoroethylene); NWs, nanowires; NFs, nanofibers; LS, layered structure. d) Comparison of the maximized U e and the corresponding η of the solution-processed ferroelectric polymer nanocomposites [25,[51][52][53][54]56,59,61].…”

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confidence: 99%

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Enabling High‐Energy‐Density High‐Efficiency Ferroelectric Polymer Nanocomposites with Rationally Designed Nanofillers

Yang

Zhou

et al. 2020

Adv Funct Materials

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Ferroelectric polymers have been regarded as the preferred matrix for high‐energy‐density dielectric polymer nanocomposites because of their highest dielectric constants among the known polymers. Despite a library of ferroelectric polymer‐based composites having been demonstrated as highly efficient in enhancing the energy density, the charge–discharge efficiency remains moderate because of the high intrinsic loss of ferroelectric polymers. Herein, a systematic study of the oxide nanofillers is presented with varied dielectric constants and the vital role of the dielectric match between the filler and the polymer matrix on the capacitive performance of the ferroelectric polymer composites is revealed. A combined experimental and simulation study is further performed to specifically investigate the effect of the nanofiller morphology on the electrica properties of the polymer nanocomposites. The solution‐processed ferroelectric polymer nanocomposite embedded with Al2O3 nanoplates exhibits markedly improved breakdown strength and discharged energy density along with an exceptional charge–discharge efficiency of 83.4% at 700 MV m−1, which outperforms the ferroelectric polymers and nanocomposites reported to date. This work establishes a facile approach to high‐performance ferroelectric polymer composites through capitalizing on the synergistic effect of the dielectric properties and morphology of the oxide fillers.

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confidence: 54%

Section: Ferroelectric Polymer Composites With 2d Nanofillersmentioning

confidence: 99%

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confidence: 99%

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Enabling High‐Energy‐Density High‐Efficiency Ferroelectric Polymer Nanocomposites with Rationally Designed Nanofillers

Yang

Zhou

et al. 2020

Adv Funct Materials

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“…Xie et al reported an all-organic five-layer composite film composed of alternating PVDF and P(VDF-TrFE-CTFE) films. A high energy density of 18.12 J/cm 3 is measured at 620 MV/m [127] .…”

Section: Layer-structured Compositesmentioning

confidence: 97%

“…PVDF/P(VDF-TrFE-CTFE)/PVDF [127] 11.11 ~0.03 571 18.12 @ 620 MV/m ~50 >10 6 P(VDF-HFP)-BT (outer)/PMMA (center) [125] ~5.2 ~0.06 559 17.1 @ 559 MV/m 82 >600…”

Section: Multilayered Compositesmentioning

confidence: 99%

Recent progress on dielectric polymers and composites for capacitive energy storage

Han

Wang

2022

iEnergy

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Polymer dielectrics-based capacitors are indispensable to the development of increasingly complex, miniaturized and sustainable electronics and electrical systems. However, the current polymer dielectrics are limited by their relatively low discharged energy density, efficiency and poor high-temperature performance. Here, we review the recent advances in the development of high-performance polymer and composite dielectrics for capacitive energy storage applications at both ambient and elevated temperature (≥ 150 °C). We highlight the underlying rationale behind the material development by constructing the relationship between the physical properties of materials and their energy-storage capability. Challenges and future opportunities are discussed at the end of the review.

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Largely Improved Breakdown Strength and Discharge Efficiency of Layer‐Structured Nanocomposites by Filling with a Small Loading Fraction of 2D Zirconium Phosphate Nanosheets

Liang

Shi

Tan

et al. 2021

Adv Materials Inter

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Dielectric film capacitors have aroused considerable attention on account of the fast development of pulsed power systems. However, enhanced energy density is always acquired at the cost of deteriorated charge/discharge efficiency. Herein, well balanced energy density and efficiency are achieved in a series of reasonably designed bilayer composites consisting of a ferroelectric layer and a paraelectric layer at the meantime. It is interesting to find that, when merely 1.6 wt% Zr(HPO4)2 nanosheets are introduced into the ferroelectric layer, a substantially improved energy density of 11.22 J cm−3, which is about 165% that of the bilayer composite without Zr(HPO4)2 nanosheets, is achieved at 650 kV mm−1. Meanwhile, a high charge/discharge efficiency of 89.8% and a low loss tangent of 0.024@10 kHz which is much lower than the pristine ferroelectric polymer layer (0.058@10 kHz) is maintained. Furthermore, finite element simulation reveals that the electric breakdown paths will develop along the macroscopical‐interfaces between adjoining layers and the microcosmic‐interfaces between the Zr(HPO4)2 nanosheets and polymer matrix, which can effectively increase the length of breakdown paths and contribute to improved breakdown strength. This work demonstrates that the Zr(HPO4)2 nanosheets can be promising fillers for other high‐performance dielectric composites.

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Polymer dielectrics exhibiting an anomalously improved dielectric constant simultaneously achieved high energy density and efficiency enabled by CdSe/Cd_1−xZn_xS quantum dots

Abstract:
Significantly improved energy density and efficiency are achieved by doping CdSe/Cd_1−xZn_xS quantum dots into polymers.

Cited by 27 publications

References 56 publications

Enabling High‐Energy‐Density High‐Efficiency Ferroelectric Polymer Nanocomposites with Rationally Designed Nanofillers

Enabling High‐Energy‐Density High‐Efficiency Ferroelectric Polymer Nanocomposites with Rationally Designed Nanofillers

Recent progress on dielectric polymers and composites for capacitive energy storage

Largely Improved Breakdown Strength and Discharge Efficiency of Layer‐Structured Nanocomposites by Filling with a Small Loading Fraction of 2D Zirconium Phosphate Nanosheets

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Polymer dielectrics exhibiting an anomalously improved dielectric constant simultaneously achieved high energy density and efficiency enabled by CdSe/Cd1−xZnxS quantum dots

Abstract: Significantly improved energy density and efficiency are achieved by doping CdSe/Cd1−xZnxS quantum dots into polymers.

Cited by 27 publications

References 56 publications

Enabling High‐Energy‐Density High‐Efficiency Ferroelectric Polymer Nanocomposites with Rationally Designed Nanofillers

Enabling High‐Energy‐Density High‐Efficiency Ferroelectric Polymer Nanocomposites with Rationally Designed Nanofillers

Recent progress on dielectric polymers and composites for capacitive energy storage

Largely Improved Breakdown Strength and Discharge Efficiency of Layer‐Structured Nanocomposites by Filling with a Small Loading Fraction of 2D Zirconium Phosphate Nanosheets

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Product

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Polymer dielectrics exhibiting an anomalously improved dielectric constant simultaneously achieved high energy density and efficiency enabled by CdSe/Cd_1−xZn_xS quantum dots

Abstract:
Significantly improved energy density and efficiency are achieved by doping CdSe/Cd_1−xZn_xS quantum dots into polymers.