Covalently modified organic nanoplatelets and their use in polymer film capacitors with high dielectric breakdown and wide temperature operation

Klein, Rob; Barber, Peter; Chance, W. Michael; Loye, Hans-Conrad zur

doi:10.1109/tdei.2012.6259996

Cited by 10 publications

(7 citation statements)

References 17 publications

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“…The current high glass transition temperatures (T g ) polymer dielectrics include polyimide (PI, T g ≈ 360 °C), polyetherimide (PEI, T g ≈ 217 °C), polyetheretherketone (PEEK, T g ≈ 143 °C), polycarbonate (PC, T g ≈ 150 °C), fluorine polyester (FPE, T g ≈ 330 °C), and polyamide-imide (PAI, T g > 300 °C). [18][19][20][21][22][23][24][25] Despite high-T g values of these polymers, the discharged energy density (U e ) and charge-discharge efficiency (η = U e /U × 100%, U: stored energy density) of the film capacitors deteriorate drastically at elevated temperatures. This is due to the nonlinear increase of conduction loss as a result of the temperature and field-dependent conduction mechanisms.…”

Section: Introductionmentioning

confidence: 99%

A Facile In Situ Surface‐Functionalization Approach to Scalable Laminated High‐Temperature Polymer Dielectrics with Ultrahigh Capacitive Performance

Dong

et al. 2021

Adv Funct Materials

153

112

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High‐temperature dielectric materials for capacitive energy storage are in urgent demand for modern power electronic and electrical systems. However, the drastically degraded energy storage capabilities owing to the inevitable conduction loss severely limit the utility of dielectric polymers at elevated temperatures. Herein, a new approach based on the in situ preparation of oxides onto polyimide (PI) films to high‐temperature laminated polymer dielectrics is described. As confirmed by computational simulations, the charge injection at the electrode/dielectric interface and electrical conduction in dielectric films are substantially depressed via engineering the in situ prepared oxide layer in the laminated composites. Consequently, ultrahigh dielectric energy densities and high efficiencies are simultaneously achieved at elevated temperatures. Especially, an excellent energy density of 1.59 J cm−3 at a charge–discharge efficiency of above 90% has been achieved at 200 °C, outperforming the current dielectric polymers and composites. Together with its excellent discharging capability and cyclic reliability, the laminate‐structured film is demonstrated to be a promising class of polymer dielectrics for high‐power energy storage capacitors operating at elevated temperatures. The facile preparation method reported herein is readily adaptable to a variety of polymer thin films for energy applications under extreme environments.

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Section: Introductionmentioning

confidence: 99%

A Facile In Situ Surface‐Functionalization Approach to Scalable Laminated High‐Temperature Polymer Dielectrics with Ultrahigh Capacitive Performance

Dong

et al. 2021

Adv Funct Materials

153

112

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“…In the interfacial charge layer, the electrons would scatter. The deeper traps level would be introduced by nanoparticles adding [ 37 ], so the breakdown field of nanocomposite was the highest. With the increasing of nanoparticles, the particles distance was smaller.…”

Section: Results and Analysis Of Macroscopic Testsmentioning

confidence: 99%

The Research of Conductivity and Dielectric Properties of ZnO/LDPE Composites with Different Particles Size

Cheng

Guang

et al. 2020

Materials

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Nanocomposites exhibit a high dielectric strength, whereas microcomposites exhibit a high thermal conductivity. In this study, good insulating materials were developed on the basis of the synergetic effect of micro- and nanoparticles, which were used as inorganic fillers. With a double-melting blend, nano-ZnO/low density polyethylene (LDPE), micro-ZnO/LDPE, and micro-nano-ZnO/LDPE composites were prepared, according to the scanning electron microscope test, polarization microscope test, conductivity test, breakdown test, and dielectric spectrum test, the dielectric property of micro-nano-ZnO/LDPE was explored. The SEM test results showed that by adding a suitable proportion of ZnO particles, the inorganic particles could disperse uniformly without reuniting. The PLM test results showed that the micro- and nano-ZnO particles adding decreased the crystal size. The arrangement was regular and tight. The macroscopic results showed that the mass fraction of nanoparticles and microparticles were 3% and 2%, the samples conductivity was the lowest. The breakdown field strength of the nanocomposites increased. The breakdown field strength of nanocomposites with 1%, 3%, and 5% nanoparticle contents were 5%, 15%, and 10% higher than that of pure LDPE. The addition of inorganic particles resulted in new polarization modes: Ionic displacement polarization and interfacial polarization. The ZnO/LDPE composites exhibited a higher dielectric constant and dielectric loss factor than pure LDPE. However, with the increasing frequency, it took considerable time to attain interfacial polarization in the nanocomposite and micro-nanocomposite, thus decreasing the dielectric constant.

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“…The multicore mode was used to qualitatively explain the nanodielectric property changes in the experiment. These include the breakdown property [21], dielectric constant, partial discharge property, space charge inhibition, electrical tree properties [22], dielectric conductivity, and coronaresistance properties.…”

Section: Polymer-binding Modelmentioning

confidence: 99%

Research Progress on Polymeric Inorganic Nanocomposites Insulating Materials

Guang

Cheng

Duan

2022

Journal of Nanomaterials

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With the rapid development of power energy, electronic information, rail transit, and aerospace industries, nanocomposite dielectric materials have been widely used as new materials. Polymer/inorganic nanocomposite dielectric materials possess excellent physical and mechanical properties. In addition, numerous unique properties such as electricity, thermal, sound, light, and magnetic properties are exhibited by these materials. First, the macroscopic quantum tunneling effect, small-size effect, surface effect, and quantum-size effect of nanoparticles are introduced. There are a few anomalous changes in the physical and chemical properties of the matrix, which are caused by these effects. Second, the interaction mechanism between the nanoparticles and polymer matrix is introduced. These include infiltration adsorption theory, chemical bonding, diffusion theory, electrostatic theory, mechanical connection theory, deformation layer theory, and physical adsorption theory. The mechanism of action of the interface on the dielectric properties of the composites is summarized. These are the interface trap effect, interface barrier effect, and homogenization field strength effect. In addition, different interfacial structure models were used to analyze the specific properties of nanocomposite dielectric materials. Finally, the research status of the dielectric properties of nanocomposite dielectric materials is introduced.

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Covalently modified organic nanoplatelets and their use in polymer film capacitors with high dielectric breakdown and wide temperature operation

Cited by 10 publications

References 17 publications

A Facile In Situ Surface‐Functionalization Approach to Scalable Laminated High‐Temperature Polymer Dielectrics with Ultrahigh Capacitive Performance

A Facile In Situ Surface‐Functionalization Approach to Scalable Laminated High‐Temperature Polymer Dielectrics with Ultrahigh Capacitive Performance

The Research of Conductivity and Dielectric Properties of ZnO/LDPE Composites with Different Particles Size

Research Progress on Polymeric Inorganic Nanocomposites Insulating Materials

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