Abstract
Nano-composite films have been the subject of extensive work for developing the energy-storage efficiency of electrostatic capacitors. Factors such as polymer purity, nanoparticle size, and film morphology drastically affect the electrostatic efficiency of the dielectric material that forms the insulating film between the conductive electrodes of a capacitor. This in turn affects the energy storage performance of the capacitor. In the present work, we have studied the dielectric properties of four highly pure amorphous polymer films: polymethyl methacrylate (PMMA), polystyrene, polyimide and poly-4-vinylpyridine. Comparison between the dielectric properties of these polymers has revealed that the higher breakdown performance is a character of polyimide (PI) and PMMA. Also, our experimental data shows that adding colloidal silica to PMMA and PI leads to a net decrease in the dielectric properties compared to the pure polymer.
Highlights
High operating voltages are an essential characteristic to assess and to improve the efficiency of the energy storage of materials
At 105 Hz,5 the above-mentioned nano-polymers have nearly the same dielectric constant; At 10 Hz, the above‐mentioned nano‐polymers have nearly the same dielectric constant; they markedly differ in the electric breakdown (EBD) voltages, which ranged from 4 ˆ 108 volts/m for8PS to 8 ˆ 108 volts/m they markedly differ in the EBD voltages, which ranged from 4 × 10 volts/m for PS to for polymethyl methacrylate (PMMA)
In order to get more efficient materials for energy storage, scientists have developed the abilities of electrostatic capacitors
Summary
High operating voltages are an essential characteristic to assess and to improve the efficiency of the energy storage of materials. Monotonic reduction of the electrical breakdown appears by increasing the metal-oxide nanoparticles [11,12,13,14,15,16,17] This can be analyzed considering randomly dispersed nanoparticles which form percolation networks which can prematurely break down the material, in particular at the high loading rates of TiO2 and BaTiO3. From the experimental point of view, alternating nano-layers of high dielectric polymers poly (vinylidene fluoride) (PVDF) and polycarbonate has increased dielectric strength, which is created by the barriers present in the polymer These barriers in turn impede the transfer of the electric field [31,32,33,34]. Cheap polymer nano-composites can develop amorphous polymers with low breakdown values, especially if there are additional properties as flammability suppression and heat deflection
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