Dual crosslinked PMMA/BaTiO₃ polymer nanocomposite dielectrics for flexible film capacitors

Abstract

The BaTiO3(BT) nanoparticles were surface modified by polyethylene glycol methacrylate phosphate, and the C=C groups on the phosphate were used as the reaction sites with methyl methacrylate (MMA) monomers for...

Achieving Higher Dielectric and Energy Storage Performances of Methyl Methacrylate-co-glycidyl Methacrylate Films through the Nanocomposite Strategy

“…In recent years, dielectric materials with ultrafast charge–discharge time, high power density, and outstanding cycling stability have been widely applied in various electrical power systems. − To meet the demands of lightweight and miniaturization of modern electronic devices, how to achieve the higher energy density and efficiency of the dielectric materials remains crucial . In general, the energy density ( U e ) of dielectric materials between the two electrodes can be calculated using the following equation U e = ∫ E normald D where E and D represent the applied electric field and electric displacement, respectively . As for linear dielectrics, U e also can be formulated as U e = 1 / 2 ε ε 0 E normalb 2 where ε is real dielectric constant, ε 0 is vacuum dielectric constant (8.85 × 10 –12 F/m), and E b is breakdown strength.…”

“…where E and D represent the applied electric field and electric displacement, respectively. 10 As for linear dielectrics, U e also can be formulated as…”

Molecular engineering of a polyimide copolymer enables excellent dielectric and energy storage performance

“…Due to their virtues of being light weight, easy processability and flexibility, high permittivity polymer dielectric materials have drawn considerable attention for potential applications in advanced dielectric capacitors, integrated circuit dielectrics and electromagnetic interface shielding. [1][2][3][4][5][6] Unfortunately, the application of polymer dielectric materials in the field of compact-size electronic devices and severe environments is restricted by their inferior energy densities and poor operating temperatures. 1,6,7 For instance, the energy density of commercial biaxially-oriented polypropylene (BOPP) is usually below 2.0 J cm À3 because of its low permittivity.…”

“…[1][2][3][4][5][6] Unfortunately, the application of polymer dielectric materials in the field of compact-size electronic devices and severe environments is restricted by their inferior energy densities and poor operating temperatures. 1,6,7 For instance, the energy density of commercial biaxially-oriented polypropylene (BOPP) is usually below 2.0 J cm À3 because of its low permittivity. [7][8][9] Substantially increasing the energy density and operating temperature of polymer dielectric materials would thus be needed for the microminiaturization and multifunctionalization of electronic devices.…”

“…Additionally, much effort has been dedicated to ferroelectric polymer composites, such as poly(vinylidene fluoride) and its co-polymers. 6,29 Nevertheless, the large hysteresis loss of ferroelectric polymers would enable high energy loss during the charge-discharge process, resulting in an inferior charge-discharge efficiency (Z), thereby significantly hindering their application in electronic devices. To balance the dielectric permittivity, a College of Chemistry and Chemical Engineering, Nanofiber Engineering Center of dielectric loss, E b and Z, a great deal of research has focused on the preparation of all-organic dielectric polymer materials, such as PMMA/PS, PP/PVDF and PMMA/P(VDF-HFP) and so on.…”