Novel inorganic fillers of 1D hydroxyapatite nanowires induced superior energy storage performances of P(VDF–HFP)-based composite films

Abstract

High-performance flexible dielectric capacitors perform a decisive effect in advanced electronics and electrical power systems. Nevertheless, the discharge energy density (Ud) of dielectric capacitors is bounded by its weak breakdown...

Sub‐Nanowires Boost Superior Capacitive Energy Storage Performance of Polymer Composites at High Temperatures

“…[ 3,7–10 ] Intensive efforts have therefore been devoted to increase the U d , especially at elevated temperature of polymers by introducing inorganic fillers with higher ε r and large bandgap such as boron nitride (BN), silica (SiO 2 ), and aluminum oxide (Al 2 O 3 ). [ 11–18 ] Nevertheless, as ε r of these fillers is only slightly higher than polymers, high volume fraction of fillers (ca. 10 vol.%) is needed for appreciable improvement of U d , which leads to issues such as filler aggregation during the fabrication of materials and increasing cost for large‐scale production.…”

Ultrahigh energy storage capacity in multilayer-structured cellulose-based dielectric capacitors caused by interfacial polarization-coupled Schottky barrier height

“…In 2017, C. Nan et al filled the BaTiO 3 @TiO 2 core–shell particles in the PVDF matrix to both enhance its electric displacement and electric breakdown strength ( E b ), and the ESD of PVDF-based composites increased to ∼20 J cm −3 . 11 In some of the latest studies, by suppressing free charge migration, a good ESD of 27.6 J cm −3 was obtained from P(VDF-HFP)/HAP@Al 2 O 3 composites, according to Zhai et al 12 M. Liu et al fabricated periodic-structured polymers consisting of PVDF and single-crystalline PbZrO 3 , which were obtained from the water-soluble sacrificial layer method. Due to the blocking effect of the PbZrO 3 layer on the spread of electric current, an ESD of 43.3 J cm −3 was achieved.…”

Enhanced dielectric performance with high-temperature stability by interface-modulation of the core–shell structured imide-polymer@BT nanohybrids in PEI-based nanocomposites

“…, into polymers holds great promise for fabricating high- ε dielectrics. 10–17 However, owing to the huge differences, such as surface energy and conductivity, between ceramics and polymers, the two-phase interface in ceramic–polymer composites may form weak regions, which will result in severe damage to breakdown strength and offset the substantial enhancement in energy storage properties. 18–20…”

“…A composite strategy of introducing nanoceramics, such as barium titanate (BT), strontium titanate (STO), hydroxyapatite (HAP), etc., into polymers holds great promise for fabricating high-e dielectrics. [10][11][12][13][14][15][16][17] However, owing to the huge differences, such as surface energy and conductivity, between ceramics and polymers, the two-phase interface in ceramic-polymer composites may form weak regions, which will result in severe damage to breakdown strength and offset the substantial enhancement in energy storage properties. [18][19][20] A feasible approach to addressing this shortcoming is to manufacture the strengthened interface by surface modification of ceramic fillers.…”