High field tunneling as a limiting factor of maximum energy density in dielectric energy storage capacitors

Chen, Qin; Wang, Yong; Zhou, Xin; Zhang, Q. M.; Zhang, Shihai

doi:10.1063/1.2903115

Cited by 107 publications

(90 citation statements)

References 19 publications

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“…The dielectric loss of dielectric materials at high electric fields is significantly different from those measured at weak fields because of the emergence of several high-field phenomena. For example, although polypropylenes show negligible loss (r0.018%) in the dielectric spectra, the loss is as high as B15% at 600 MV m À 1 owing to the exponentially increased leakage current 21 . In addition to highfield conduction, which is a universal phenomenon in all dielectric materials, ferroelectric materials have characteristic ferroelectric switching loss related to polarization hysteresis 11 .…”

Section: Resultsmentioning

confidence: 99%

“…In addition to highfield conduction, which is a universal phenomenon in all dielectric materials, ferroelectric materials have characteristic ferroelectric switching loss related to polarization hysteresis 11 . To investigate the effect of cross-linking on the different loss mechanisms, the conduction loss is derived from the D-E loops with the assumption that the measured polarization at zero field (P E ¼ 0 ) comes mainly from the leakage current, given that the ferroelectric films in this investigation contain insignificant contents of the polar phase 21 . The relationship between the effective conductivity s eff and P E ¼ 0 can be derived as follows:…”

Section: Resultsmentioning

confidence: 99%

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Ferroelectric polymer networks with high energy density and improved discharged efficiency for dielectric energy storage

et al. 2013

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Ferroelectric polymers are being actively explored as dielectric materials for electrical energy storage applications. However, their high dielectric constants and outstanding energy densities are accompanied by large dielectric loss due to ferroelectric hysteresis and electrical conduction, resulting in poor charge-discharge efficiencies under high electric fields. To address this long-standing problem, here we report the ferroelectric polymer networks exhibiting significantly reduced dielectric loss, superior polarization and greatly improved breakdown strength and reliability, while maintaining their fast discharge capability at a rate of microseconds. These concurrent improvements lead to unprecedented charge-discharge efficiencies and large values of the discharged energy density and also enable the operation of the ferroelectric polymers at elevated temperatures, which clearly outperforms the melt-extruded ferroelectric polymer films that represents the state of the art in dielectric polymers. The simplicity and scalability of the described method further suggest their potential for high energy density capacitors.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Ferroelectric polymer networks with high energy density and improved discharged efficiency for dielectric energy storage

et al. 2013

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“…On the other hand, many studies show the higher breakdown strength is related to the lower dielectric loss. 10,11 So, the efforts to improve the overall dielectric performance of these materials are devoted to maximizing the dielectric constant and suppress the loss.…”

Section: Introductionmentioning

confidence: 99%

The influence of self-assembly behavior of nanoparticles on the dielectric polymer composites

Lu¹,

Li²,

Wang³

et al. 2013

AIP Advances

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To clearify the influence of the distribution of the conductive nanoparticles on the dielectric properties of the corresponding polymer composites, the microstructure and dielectric character of the composites based on the oleic acid modified ferroferric oxide and polyvinylidene fluoride (PVDF) polymer have been studied experimentally. It is found that these composites exhibit a normal percolative phase transition over the filler content from insulator to conductor, consistent with the classical percolation theory. However, when the percentage of fillers is at a certain value which is below the percolation threshold, these nanoparticles can assemble into a special porous structure in the PVDF matrix, associated with the enhancement of dielectric constant at low frequency. In addition, the controllable dispersion of conducting nanoparticles in a polymer matrix can prevent premature agglomeration at low filling fractions and avoid the appearance of anomalously early percolation. Therefore, the self-assembly behavior of nanoparticles can be beneficial to preparation of the high dielectric constant and low loss composites for the application of electric energy storage.

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“…Organic polymer materials, such as poly(vinylidene fluoride) (PVDF) and its copolymer poly(vinylidene-trifluoroethylene) (PVDF-TrFE), have good ferroelectric properties, piezoelectric properties, and flexibility [7,8]. However, the permittivity of organic polymer materials is lower than that of inorganic ceramic materials [9]. One effective way to obtain high performance materials is to combine ceramics with polymers to form organic-inorganic composites.…”

mentioning

confidence: 99%

Synthesis and characterization of poly(vinylidene‐trifluoroethylene)/NiTiO₂

Kuang

Lin

Zhu

2012

Physica Status Solidi (a)

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Ni-TiO 2 nanoparticles were prepared by the sol-gel method, and a composite film of poly(vinylidene-trifluoroethylene) (PVDF-TrFE)/Ni-TiO 2 was prepared by the solution cast method. The microstructure of Ni-TiO 2 was investigated by transmission electron microscopy (TEM). The film was characterized by TEM, X-ray diffraction (XRD), differential scanning calorimetry (DSC), and dielectric property testing. The results showed that the Ni-TiO 2 nanoparticles were well dispersed in the polymer matrix. With the increase of Ni-TiO 2 content, the crystallinity of PVDF-TrFE/Ni-TiO 2 decreased. The permittivity of the films improved significantly with the increase of Ni-TiO 2 content. The permittivity at 1000 Hz and room temperature increased to 18.56 for PVDF-TrFE/ Ni 0.1 -TiO 2 (60 wt%) from the value of 11.17 for the pure PVDF-TrFE film. Furthermore, the permittivity of the composite film increased with the increase of temperature.

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High field tunneling as a limiting factor of maximum energy density in dielectric energy storage capacitors

Cited by 107 publications

References 19 publications

Ferroelectric polymer networks with high energy density and improved discharged efficiency for dielectric energy storage

Ferroelectric polymer networks with high energy density and improved discharged efficiency for dielectric energy storage

The influence of self-assembly behavior of nanoparticles on the dielectric polymer composites

Synthesis and characterization of poly(vinylidene‐trifluoroethylene)/NiTiO₂

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High field tunneling as a limiting factor of maximum energy density in dielectric energy storage capacitors

Cited by 107 publications

References 19 publications

Ferroelectric polymer networks with high energy density and improved discharged efficiency for dielectric energy storage

Ferroelectric polymer networks with high energy density and improved discharged efficiency for dielectric energy storage

The influence of self-assembly behavior of nanoparticles on the dielectric polymer composites

Synthesis and characterization of poly(vinylidene‐trifluoroethylene)/NiTiO2

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Synthesis and characterization of poly(vinylidene‐trifluoroethylene)/NiTiO₂