Tunable BT@SiO2 core@shell filler reinforced polymer composite with high breakdown strength and release energy density

Physico-Mechanical, Dielectric, and Piezoelectric Properties of PVDF Electrospun Mats Containing Silver Nanoparticles

“…Many authors reported improvements in the dielectric constant of nanocomposites composed of PVDF, as well as other polymers, and various inorganic nanoparticle fillers [3,12,19,26,27,[29][30][31][32][33][34][35][36][37]. Some of these studies reported on nanocomposites containing PVDF and silver nanoparticles [12,19,29,30,36].…”

Towards suppressing loss tangent: Effect of SiO2 coating layer on dielectric properties of core-shell structure flaky Cu reinforced PVDF composites

“…Moreover, the dielectric constant is almost independent of frequency, indicating that there is no plentiful accumulation of interfacial charges inside the composites. Once the f → f c , where f-Cu are close to each other, and there are many f-Cu particles separated by very thin matrix layers within the composites, thereby leading to a large number of microcapacitors and an increase in the capacitance of each microcapacitor [17,19]. So, a sudden increase in dielectric constant at low frequencies can be noticed because of the Maxwell-Wanger-Silars (MWS) interfacial polarization.…”

“…As shown in The dielectric loss is a measurement of energy dissipation from the movement or rotation of the molecules in the external electric field. Reducing the dielectric loss is the target of many investigations on preparing high-k electric conductor/polymer composites because suffering from an abrupt variant in tanδ is a fatal disadvantage for its practical engineering use [17][18][19], however, reducing the tanδ into capacitor-tolerated values (tanδ≤1) while remaining high dielectric constant is still found to be difficult [6]. there were well-established particle clusters or partial connectivity of the filler, resulting in an increased dielectric loss [22,23], as demonstrated in Fig.…”

“…To meet this need, in recent years, much efforts have been devoted to develop polymer composites with high-k which attract great attention because of their unique combination of mechanical flexibility and tunable dielectric properties used as capacitor dielectrics, and electroactive materials [9][10][11][12]. Nowadays, the flexible polymeric composites with high-k and low dielectric losses have been increasingly required because of the rapid development of high performance electronic components and electrical equipments, such as energy storage devices, embedded capacitors, artificial muscles and skins, electric accessories, actuators, and other flexible electronics [13][14][15][16][17][18][19].…”

“…So far, Polymer/ferroelectric ceramic composites and polymer/conductive filler percolative dielectric composites are two kinds of research concentrations that are widely studied. The most common and promising strategy to obtain high-k flexible polymer composites is dispersing ceramic particles with giant dielectric permittivity into the polymer matrices, which capitalizes upon the idea that the combination of colossal permittivity of inorganic particles with good dielectric strength of polymers [1,11,[17][18], while, the biggest problem is that the dielectric permittivity is still very low (<50) with even high filler loading, which inevitably deteriorates the mechanical properties and dielectric strengths of the composites [9,10]. To overcome the limitations of ferroelectric polymer/ceramic composites, very promising work has been carried out based percolation theory, in which a small volume fraction of conductive filler was added to the polymer matrix to achieve a high-k, thus preserving the mechanical flexibility of the polymer [6, 8-10, 13, 15].…”