Colossal permittivity in percolative ceramic/metal dielectric composites

Interface design for high energy density polymer nanocomposites

“…Polymer nanocomposites for energy storage applications continues to be a growing area that has attracted increasing discussion via a variety of existing reviews. These include a wide variety of key topics, which include an examination of PVDF and its copolymers, and their nanocomposites for high energy density capacitor applications; 7,8,11,22,[42][43][44][45] high-temperature dielectric nanocomposites; 10,15 high-k dielectrics; 18,46,47 recent achievements on BaTiO 3 nanomaterials and their synthesis, dielectric and ferroelectric properties; 48 dielectric and energy storage properties of polymers and multilayered dielectrics films; 3,49,50 ceramic films and bulk ceramics for energy storage capacitors; 12,16,25,32,51 the effects of fillers on the dielectric and energy storage properties of polymer composites; 2,52 carbon based polymer composites for energy storage; 9,53,54 polymer based nanodielectric design for advanced capacitors; 45,55,56 interface engineering in polymer nanocomposites to improve energy storage; 36,57 and the strategies for engineering the surfaces of fillers. 58 This review will cover methods of interface design by introducing the range of interface layers and structures.…”

“…17 In addition, MLCCs can endure a relatively high electric field due to the small thickness of the individual layers, of the order of several microns, compared with bulk ceramic capacitors whose dimensions are several hundred microns. 18 Recently, electroactive polymers with high relative permittivity, such as ferroelectric poly(vinylidenefluoride) (PVDF) and its co/terpolymers, and ceramic/polymer composites have been intensively studied due to their high permittivity and high breakdown strength. A comparison to show the ranges for different energy storage devices are summarized in Table 2, where the advantages of polymer based dielectric capacitors include high power density, high efficiency, stability and low cost compared…”

Multifunctional barium titanate ceramics via chemical modification tuning phase structure

“…In addition to chemical modification, microstructure modification can also modulate the electrical properties of BT‐based ceramics, such as multilayer structure, ceramic/metal composites, core‐shell structure, porous ceramics, et al Compared to a single‐layer ceramic, the higher BDS and blocking force can be obtained in the multilayer ceramic structure (eg, multilayer ceramic capacitor [MLCC], multilayer actuator [MLA]), where the ceramic layers are co‐fired with internal electrodes. Thus, the enhancement in strain, electrocaloric, energy storage and capacitance performance can be achieved if the multilayer structure is employed in BT‐based ceramics 38,198,214,215 . BT‐based metal/ceramic (0‐3) composite exhibits colossal permittivity ( ε r > 10 4 ) induced by the interface effect between ceramic (insulating) phase and metal (conductive) phase, where the metal particles are dispersed into the ceramic matrix without entering into the lattice structure 215 .…”

Mechanism studies of hydrothermal cold sintering of zinc oxide at near room temperature

“…While these methods increase densification rate, temperatures near or above 1000°C remain necessary for complete densification. These high fabrication temperatures impose limits on integration between ceramics, metals, and polymers, affecting applications such as energy storage and passive components . In addition, these high temperatures impact ceramic devices like semiconductor varistors and ferroelectric capacitors, where a specific and fine grain size is desired for optimal performance.…”