Graphene@poly(dopamine)-Ag core–shell nanoplatelets as fillers to enhance the dielectric performance of polymer composites

High-energy-density polymer dielectrics via compositional and structural tailoring for electrical energy storage

“…dielectric constant of 10 with a low loss tangent of 0.008). Moreover, introducing ultra-small Ag nanoparticles had effectively decreased the dielectric loss and conductivity of TPU/GNS/Ag composites, which resulted in the improvement of energy storage characteristics of the composite ( Zhu et al., 2020 ). In comparison to binary BT/polymer composites, the 2D multiphase systems with 2D MXene nanosheets significantly improved the dielectric constant, which ascribes to remarkably increased interface types and enhanced interface polarization ( Feng et al, 2019 ).…”

“…Although the incorporation of single 2D nanofillers enhances the energy density to a certain degree, the nanocomposites are still unsuitable for energy storage because of high energy loss of high ϵ r fillers or low polarization of highly insulating fillers. To further enhance the energy density and meet the need for energy storage applications, multiphase 2D nanofillers are introduced into the polymer matrix in single-layered polymer nanocomposites ( Liu et al., 2020 ; Wang et al., 2018b ; Ke et al., 2019 ; Zhu et al., 2020 ; Feng et al, 2019 ; Deng et al, 2019; He et al., 2018 ; Luo et al., 2018 ; Li et al., 2019 ; Song et al., 2020 ) or different 2D materials are filled separately into multilayer-structured nanocomposites ( Guo et al., 2020 ; Chi et al., 2019 ; Wu et al., 2018a ; Liu et al., 2017b ; Shen et al., 2015 ).…”

“…In single-layered polymer nanocomposites, the 2D multiphase systems with both conductive 2D fillers and relatively insulating fillers enable to achieve both high ϵ r and low loss tangent ( Ke et al., 2019 ; Zhu et al., 2020 ). Ke et al.…”

Interface coupling and energy storage of inorganic–organic nanocomposites

“…Ultra-small silver nanoparticles were introduced due to the coulomb blocking and quantum well carrier structure effect, which improves the energy storage characteristics of composites. 189 Therefore, an insulating layer coated as the outer layer onto a conductor ller reduces the accumulation of charges at the interface, enhances the interface coupling ability, further reduces the dielectric loss, and ultimately improves the energy storage performance. However, the preparation of conductor core-shell llers is time-consuming and requires complex chemical synthesis.…”

The paradigm of the filler's dielectric permittivity and aspect ratio in high-k polymer nanocomposites for energy storage applications

“…28,29 Likewise, high aspect ratio fillers like nanowires are beneficial for designing high-k nanocomposite films with enhanced performances for energy storage applications. [30][31][32][33][34] For instance, Tang et al demonstrated that the e r of the nanocomposite can be highly efficiently improved by the high aspect ratio of the fillers without additional fillers or defect incorporation into the nanocomposites. 35 Furthermore, Tang et al reported that embedding PbZr 0.52 -Ti 0.48 O 3 (PZT) nanowires in the PVDF matrix could enhance the energy storage density by 77.8% compared to that of PZT nanorods.…”