Roll your own – nano-nanocomposite capacitors

Yi, Eongyu; Furgal, Joseph C.; Azurdia, Jose; Laine, Richard M.

doi:10.1039/c3ta14976e

Cited by 10 publications

(8 citation statements)

References 61 publications

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“…The higher the dielectric constant of the PMGS-ArTU films, the stronger the polarization capability, and the greater the discharge energy density. Specifically, the discharge energy density PMGS-ArTU-25 reaches above 3 J/cm 3 at 300 MV/m, which is twice as high as that (∼1.5 J/cm 3 at 300 MV/m) of conventional dielectric polymer films, such as BOPP, PEN, and PPS . With introducing more ArTU into the PMGS, the dielectric constant decreases, and accordingly, the discharge energy density starts to decrease slightly from 2.53 to 2.38 and 2.17 J/cm 3 at 300 MV/m.…”

Section: Resultsmentioning

confidence: 92%

“…Specifically, the discharge energy density PMGS-ArTU-25 reaches above 3 J/cm 3 at 300 MV/m, which is twice as high as that (∼1.5 J/cm 3 at 300 MV/ m) of conventional dielectric polymer films, such as BOPP, PEN, and PPS. 6 With introducing more ArTU into the PMGS, the dielectric constant decreases, and accordingly, the discharge energy density starts to decrease slightly from 2.53 to 2.38 and 2.17 J/cm 3 at 300 MV/m. On the other hand, continuing to increase the content of the introduced ArTU segments increases the cross-link density, and accordingly, the dielectric strength of PMGS-ArTU is enhanced because the modulus increases.…”

Section: ■ Introductionmentioning

confidence: 98%

“…Dielectric film capacitors can release tremendous electrical energy rapidly after charging under a high electric field, playing an important role in modern energy equipment such as hybrid electric vehicles, pulse power supply, , and grid converters. , The dielectric property of capacitor films determines energy density and energy storage efficiency. − Ideal dielectric film materials for high-energy-density capacitors should possess high dielectric constant (ε r ) and large breakdown strength ( E b ) because the maximum energy storage capability of a capacitor is depended on the ε r and E b of the dielectric materials. Generally, one can roughly predict the energy storage capability of a dielectric by U e = 0.5ε 0 ε r E b 2 , where ε 0 is the vacuum permittivity.…”

Section: Introductionmentioning

confidence: 99%

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All-Organic Cross-Linked Polysiloxane-Aromatic Thiourea Dielectric Films for Electrical Energy Storage Application

Liu

Chen

Jiang

et al. 2020

ACS Appl. Energy Mater.

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The development of high-power-density energy storage devices and systems calls for high-dielectric-constant (high-k) polymer films with low dielectric loss. Aromatic polythiourea attracts many interests because of its low dielectric loss and high beakdown strength, whereas the high brittleness significantly limits its application as dielectric films. In this report, flexible high-k films were successfully fabricated by cross-linking aromatic thiourea oligomers with allyl glycidyl ether grafted poly(methylhydrosiloxane) (PMHS). Siloxane segments of PMHS improve the flexibility of the cross-linked dielectric films, and the grafted glycidyl ether side groups of PMHS provide highly polarizable building blocks. Because of the high dipole moment (4.89 D), aromatic thiourea endows the dielectric films with a high dielectric constant. Microphase separation morphology was found within the film, and the self-assembly into layered lamellae contributed to the scatter of high-energy-charge carriers. As a result, the dielectric films exhibit reduced dielectric loss tangent and suppressed leakage current density with a high dielectric constant of above 6, a promissing energy density of 3.15 J/cm3 and a high efficiency of above 87% under an electric field of 350 MV/m.

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Section: Resultsmentioning

confidence: 92%

Section: ■ Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

All-Organic Cross-Linked Polysiloxane-Aromatic Thiourea Dielectric Films for Electrical Energy Storage Application

Liu

Chen

Jiang

et al. 2020

ACS Appl. Energy Mater.

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“…1−7 To meet the miniaturization and low cost requirements for electronic devices, dielectric materials with large dielectric constants (ε r ) and high breakdown strengths are strongly desired. 8,9 Nevertheless, the low dielectric constants of polymers have impeded the realization of their full potential. 10 For instance, biaxially oriented polypropylene (BOPP), which is the benchmark polymer dielectrics in current commercial applications, possesses a low dielectric constant of 2.2.…”

Section: ■ Introductionmentioning

confidence: 99%

Significantly Enhanced Dielectric Performance of Poly(vinylidene fluoride-co-hexafluoropylene)-based Composites Filled with Hierarchical Flower-like TiO₂ Particles

Zhang

et al. 2015

ACS Appl. Mater. Interfaces

135

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In this study, we report a feasible strategy for fabricating high-dielectric-constant polymer composites for applications in energy storage devices and embedded capacitors. Hierarchical flower-like TiO2 particles were prepared via a facile solvothermal process and incorporated into the P(VDF-HFP) matrix. The temperature and frequency dependent dielectric properties of flower-like TiO2/P(VDF-HFP) composites as well as commercial TiO2/P(VDF-HFP) composites were investigated. The results reveal that the flower-like TiO2 particles are more effective in increasing the dielectric constant of P(VDF-HFP) when compared with commercial TiO2. Typically, the dielectric constant of the P(VDF-HFP) composite filled with 20 vol % flower-like TiO2 reaches 83.1 at 100 Hz, in contrast to 43.4 for the composite filled with 20 vol % commercial TiO2 and 11.3 for pristine P(VDF-HFP). Also, the flower-like TiO2-filled composites exhibit similar characteristic breakdown strengths to their commercial TiO2-filled counterparts. The significant improvement in the dielectric constant could be attributed to the enhancement of Maxwell-Wagner-Sillars polarization, which originates from the sophisticated morphology of flower-like TiO2 particles.

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“…The nanoparticles are then collected downstream in electrostatic precipitators operated at approximately 10 kV DC. Details on LF‐FSP processing of nanopowders have been presented elsewhere …”

Section: Methodsmentioning

confidence: 99%

Escaping the Tyranny of Carbothermal Reduction: Fumed Silica from Sustainable, Green Sources without First Having to Make SiCl₄

Hyde

Sun

et al. 2016

Chemistry A European J

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Fumed silica is produced in 1000 tons per year quantities by combusting SiCl4 in H2 /O2 flames. Given that both SiCl4 and combustion byproduct HCl are corrosive, toxic and polluting, this route to fumed silica requires extensive safeguards that may be obviated if an alternate route were found. Silica, including rice hull ash (RHA) can be directly depolymerized using hindered diols to generate distillable spirocyclic alkoxysilanes or Si(OEt)4 . We report here the use of liquid-feed flame spray pyrolysis (LF-FSP) to combust the aforementioned precursors to produce fumed silica very similar to SiCl4 -derived products. The resulting powders are amorphous, necked, <50 nm average particle sizes, with specific surface areas (SSAs) of 140-230 m(2) g(-1) . The LF-FSP approach does not require the containment constraints of the SiCl4 process and given that the RHA silica source is produced in million ton per year quantities worldwide, the reported approach represents a sustainable, green and potentially lower-cost alternative.

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Roll your own – nano-nanocomposite capacitors

Cited by 10 publications

References 61 publications

All-Organic Cross-Linked Polysiloxane-Aromatic Thiourea Dielectric Films for Electrical Energy Storage Application

All-Organic Cross-Linked Polysiloxane-Aromatic Thiourea Dielectric Films for Electrical Energy Storage Application

Significantly Enhanced Dielectric Performance of Poly(vinylidene fluoride-co-hexafluoropylene)-based Composites Filled with Hierarchical Flower-like TiO₂ Particles

Escaping the Tyranny of Carbothermal Reduction: Fumed Silica from Sustainable, Green Sources without First Having to Make SiCl₄

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Roll your own – nano-nanocomposite capacitors

Cited by 10 publications

References 61 publications

All-Organic Cross-Linked Polysiloxane-Aromatic Thiourea Dielectric Films for Electrical Energy Storage Application

All-Organic Cross-Linked Polysiloxane-Aromatic Thiourea Dielectric Films for Electrical Energy Storage Application

Significantly Enhanced Dielectric Performance of Poly(vinylidene fluoride-co-hexafluoropylene)-based Composites Filled with Hierarchical Flower-like TiO2 Particles

Escaping the Tyranny of Carbothermal Reduction: Fumed Silica from Sustainable, Green Sources without First Having to Make SiCl4

Contact Info

Product

Resources

About

Significantly Enhanced Dielectric Performance of Poly(vinylidene fluoride-co-hexafluoropylene)-based Composites Filled with Hierarchical Flower-like TiO₂ Particles

Escaping the Tyranny of Carbothermal Reduction: Fumed Silica from Sustainable, Green Sources without First Having to Make SiCl₄