Significantly enhanced dielectric permittivity and low loss in epoxy composites incorporating 3d W-WO3/BaTiO3 foams

Zhang, Wenqiang; Zhu, Xia; Liang, Liang; Yin, Peng; Xie, Peitao; Dastan, Davoud; Sun, Kai; Shi, Zhicheng

doi:10.1007/s10853-020-05536-z

Cited by 62 publications

(12 citation statements)

References 48 publications

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“…[ 22 ] Generally, fillers can be divided into four types according to their morphologies: 1) 0D (e.g., nanoparticles, quantum dots); [ 23 ] 2) 1D (e.g., nanowires, nanofibers, and nanotubes); [ 9,22,24,25 ] 3) 2D (nanosheets, nanoplates, and nanoclays); [ 13,26–29 ] 4) 3D (e.g., filler networks). [ 30,31 ] Generally, fillers can be divided into four types according to their morphologies: 1) 0D; 2) 1D; 3) 2D; 4) 3D. Among them, the 2D fillers (e.g., BNNS, NaNbO 3 nanosheets) are believed to have huge potential for dielectric composites, because they can form abundant micro‐lamellar structures in the composites, which can induce strong Maxwell–Wagner effects and then enhance the degree of polarization.…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

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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“…The enhancements are attributed to the high dielectric properties of BTO film and the increased interfacial polarization. [ 47–50 ]…”

Section: Resultsmentioning

confidence: 99%

2–2 Type PVDF‐Based Composites Interlayered by Epitaxial (111)‐Oriented BTO Films for High Energy Storage Density

Tian

Peng

et al. 2021

Adv Funct Materials

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Quick charge/discharge polymer‐based composites filled with inorganic nanosheets have attracted extensive attention and provided a more efficient way to achieve high energy storage density (U) because of the alleviated agglomeration of fillers and the formation of conduction barriers. However, conductive paths have a chance to extend along out‐of‐plane directions by circumventing the micrometer‐sized nanosheets. Here, large‐sized (111)‐oriented BaTiO3 (BTO) films with outstanding epitaxiality and ferroelectricity are embedded in poly(vinylidene fluoride) (PVDF) using optimal transfer and hot‐pressing processes. The 2D–2D (2–2) type BTO/PVDF composites interlayered by 2‐layer BTO (about 0.2 µm thick of each layer) exhibit the highest U of 20.7 J cm‐3 at 690 MV m‐1, which is 222.6% that of pure PVDF. Phase‐field simulations reveal that high‐resistance PVDF films as outer layers can prevent the charges injection from electrodes and high‐dielectric BTO films as inner layers can effectively suppress the mobile charges across interfaces between layers, leading to a remarkable improvement of breakdown strength. This work puts forward a scalable approach to enhance the U of inorganic/organic composites for advanced energy storage materials and applications.

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“…Among organic materials, phenolic resin (PF) with low density, high bonding strength with fillers, good environmental performance and high reliability under severe conditions, has been widely used in braking materials for 250 km/h trains, heavy-duty vehicles and cars etc., and numerous applications [12][13][14][15][16][17][18][19]. It has become one of the important organic brake materials [20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Tribological Behavior of Phenolic Resin-Based Friction Composites Filled with Graphite

Gao

et al. 2021

Materials

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In this paper, the influence of graphite (Gr) on the dry sliding tribological properties of phenolic resin (PF) composites was studied under different sliding speeds of 3.1–47.1 m/s. The wear mechanism was investigated by the observation of the morphology of the transfer layer during the dry sliding process. It was found that the addition of Gr could decrease the friction coefficient and wear rate effectively, and the friction coefficient and wear rate decreased with the increase of Gr content in the range of 10–30 vol.%. The dominant wear mechanisms of PF-based friction composites changed from adhesive wear to fatigue wear (in the form of peeling-off) in the high sliding speed condition after the addition of Gr. The addition of Gr effectively reduced the sensitivity of PF-based friction materials to sliding speeds, and thus enhanced the stability of the friction coefficient. When the content of Gr was above 20 vol.%, the stability of the friction coefficient was relatively steady.

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Significantly enhanced dielectric permittivity and low loss in epoxy composites incorporating 3d W-WO3/BaTiO3 foams

Cited by 62 publications

References 48 publications

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

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

2–2 Type PVDF‐Based Composites Interlayered by Epitaxial (111)‐Oriented BTO Films for High Energy Storage Density

Tribological Behavior of Phenolic Resin-Based Friction Composites Filled with Graphite

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