Flexible dielectric nanocomposites with simultaneously large discharge energy density and high energy efficiency utilizing (Pb,La)(Zr,Sn,Ti)O₃ antiferroelectric nanoparticles as fillers

Abstract

Large discharge energy density and high energy efficiency are obtained simultaneously in antiferroelectric PLZST/P(VDF-HFP) polymer nanocomposites.

Three-dimensionally ordered macroporous BaTiO3 framework-reinforced polymer composites with improved dielectric properties

“…Polymer dielectric composites are expected to integrate excellent flexibility and easy processing of polymer matrixes with fillers with high dielectric constants. Various types of fillers, such as linear dielectrics [4,5], paraelectrics [6,7], ferroelectrics [8,9], relaxor ferroelectrics [10], antiferroelectrics [11,12], giant dielectric constant fillers [13,14] and conductive fillers [15,16], have been introduced into polymers to tailor their dielectric properties. Their high dielectric constants usually result from two aspects.…”

Energy storage and thermodynamics of PNZST thick films with coexisting antiferroelectric and ferroelectric phases

“…As the applied electric field is 240 kV/cm, the maximum W rec is 2.48 J/cm 3 for PNZST/LNO film, which is larger than 2.23 J/cm 3 of PNZST/Pt film. These results are comparable with those of the reported (Pb 0.97 La 0.02 )(Zr 0.9 Sn 0.05 Ti 0.05 )O 3 (~2.9 J/cm 3 ) 10 and Pb 0.99 Nb 0.02 (Zr 0.85 Sn 0.13 Ti 0.02 ) 0.98 O 3 (~2.4 J/cm 3 ) 36 films, and even larger than those of La‐doped PbZrO 3 (~1.5 J/cm 3 ), 37 Pb 0.97 La 0.02 (Zr 0.50 Sn 0.45 Ti 0.05 )O 3 /P(VDF‐HFP) (~2 J/cm 3 ) 38 films and (Pb 0.98 La 0.02 )(Zr 0.55 Sn 0.45 ) 0.995 O 3 (~0.9 J/cm 3 ) ceramic 3 when the applied electric field is 240 kV/cm. In addition, the slopes of W rec of PNZST/LNO and PNZST/Pt films are 0.06 J/(kV⋅cm 2 ) and 0.02 J/(kV⋅cm 2 ), respectively.…”

Significant enhancement of dielectric permittivity and percolation behaviour of La2−xSrxNiO4/poly(vinylidene fluoride) composites with different Sr doping concentrations

“…The two kinds of LSNO/ PVDF composites exhibited improved and superior 3 0 values compared to the pure PVDF (3 0 ¼ 10), and the 3 0 values increased with the addition of the LSNO llers. These enhanced 3 0 values were related to interfacial polarisation or the Maxwell-Wagner-Sillars effect, 1,5,17 which is produced by the accumulation of charge carriers at semiconductor-insulator interfaces under an applied electric eld. As shown by the previously mentioned XPS results, the higher conductivity of LSNO-2 compared to the LSNO-1 ller resulted in the LSNO-2/PVDF composite possessing higher 3 0 values for all of the ller concentrations compared to the LSNO-1/PVDF composite.…”

“…Polymer-based composite materials with high dielectric permittivity (3 0 ) values have attracted increasing research focus in recent years because they have several advantages over dielectric ceramics and potential applications in various elds, including microelectronics, pulsed power, bandpass ltering, power conditioning, sensing, and energy storage. [1][2][3][4][5][6][7] The dielectric permittivity of a polymer-based composite material can be dramatically enhanced by introducing conductive metal llers (Ni, Al, and Ag) and carbon-based llers (multiwalled carbon nanotubes, graphene, and carbon black) into the polymer matrix. A dramatically increased dielectric permittivity was obtained when the volume fraction of ller used was increased to a critical fraction, i.e., a percolation threshold (f c ), according to the percolation theory.…”