Differentiation of roughness and surface defect impact on dielectric strength of polymeric thin films

Tan, Daniel Q.

doi:10.1049/iet-nde.2019.0031

Cited by 32 publications

(22 citation statements)

References 16 publications

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Section: Discussion Of Mechanisms Of Dielectric Enhancementmentioning

confidence: 99%

“…The sample breakdown is mainly governed by the major flaws inside the sample, on the sample surface, and the adjacency of reinforcing particles, where cautions should be taken for large scale thin film tests. [ 226,227 ] Some measurements performed, for instance, in a sphere‐sphere configuration, are not very sensitive to variations within the polymeric matrix. Under a divergent field, the field is initially enhanced at the tip of the growing tree during the whole breakdown process.…”

Section: Discussion Of Mechanisms Of Dielectric Enhancementmentioning

confidence: 99%

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The search for enhanced dielectric strength of polymer‐based dielectrics: A focused review on polymer nanocomposites

Tan

2020

J of Applied Polymer Sci

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157

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Author Daniel Tan summarized the recent advances in dielectric composites with the focused search for the method of enhancing dielectric strength. A SEM image of the polymer composite is presented showing the nanoparticle dispersion and bonding with polymer matrix via an in-situ polymerization synthesis. The defects, electrical charge transport, surface imperfection causing dielectric breakdown may be suppressed by the adequate design of nanoparticle incorporation, core-shell configuration, and filler-polymer interface, which eventually leads to high performance dielectric nanocomposites for capacitors and electrical insulation.ARTICLES 48192 Microfibrillated-cellulose-reinforced polyester nanocomposites prepared by filtration and hot pressing: Bending properties and three-dimensional formability

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Section: Discussion Of Mechanisms Of Dielectric Enhancementmentioning

confidence: 99%

Section: Discussion Of Mechanisms Of Dielectric Enhancementmentioning

confidence: 99%

The search for enhanced dielectric strength of polymer‐based dielectrics: A focused review on polymer nanocomposites

Tan

2020

J of Applied Polymer Sci

Self Cite

157

View full text Add to dashboard Cite

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“…[ 1,4–7 ] Dielectric polymers as the materials of choice for film capacitors process advantages of facile processability, scalability, mechanical flexibility and high breakdown strength when compared to their ceramic counterparts. [ 8–12 ] Yet, the best commercially available dielectric polymer, biaxially oriented polypropylene (BOPP), only processes an energy density of ≈2.2 J cm −3 at a high electric field of 500 MV m −1 , [ 13,14 ] which is far below the energy densities of batteries (200–2500 J cm −3 ) and supercapacitors (20–29 J cm −3 ). [ 15,16 ] It is thus imperative to improve the energy density of film capacitors to meet the growing demand for highly integrated and miniaturized electronic systems.…”

Section: Introductionmentioning

confidence: 99%

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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“…The urgent demand of flexible electrostatic capacitor with high energy storage density and power density has aroused a considerable attention in the field of high dielectric constant (high-k) polymer nanocomposites comprising polymer matrices and inorganic fillers [1][2][3][4][5][6][7][8][9][10][11][12][13]. Numerous efforts have been devoted to improving the dielectric constant of polymer nanocomposites [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Regulating dielectric performances of Poly(vinylidene fluoride) nanocomposites by individually controlling shell thickness of Core@Double‐Shells structured nanowires

Yang

Zhang

Dang

et al. 2021

IET Nanodielectrics

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The synthesis of core@double‐shells structured TiO2@C@SiO2 nanowires (NWs) with variable thickness of carbon inner shell and SiO2 outer shell was achieved by individually controlling the chemical vapour deposition time and amount of silicon precursor added in the sol–gel synthesis. The resultant TiO2@C@SiO2 NWs filled nanocomposites exhibited an excellent dielectric performance with simultaneously improved dielectric constant and suppressed dielectric loss, which could be further regulated by individually controlling the carbon inner shell and SiO2 outer shell thickness. More importantly, the influences of the conductive carbon inner shell and insulated SiO2 outer shell thickness on the dielectric performance of nanocomposites were clearly revealed. The increase of the conductive carbon inner shell thickness would lead to an increase in dielectric constant and loss of nanocomposites, while the insulated SiO2 outer shell exhibited a totally opposite law that the dielectric constant and loss of nanocomposites decrease with increasing SiO2 outer shell thickness. Numerical simulations were also carried out to theoretically verify the relationship between the dielectric loss and SiO2 outer shell thickness. This promising controllable multi‐shell structure could be extended to a variety of hybrids to develop high‐performance dielectric nanocomposites.

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Differentiation of roughness and surface defect impact on dielectric strength of polymeric thin films

Cited by 32 publications

References 16 publications

The search for enhanced dielectric strength of polymer‐based dielectrics: A focused review on polymer nanocomposites

The search for enhanced dielectric strength of polymer‐based dielectrics: A focused review on polymer nanocomposites

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

Regulating dielectric performances of Poly(vinylidene fluoride) nanocomposites by individually controlling shell thickness of Core@Double‐Shells structured nanowires

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