Improvement of Dielectric Energy Density in PVDF Terpolymer Nanocomposites and Blends

摘要

This paper reports the finding of a large enhancement in the electric energy density in the PVDF terpolymer-based nanocomposites and blends. In the nanocomposites of poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) (PVDF-TrFE-CFE) relaxor ferroelectric polymer/ZrO{sub}2 nanoparticles, through the interface effect the presence of the nanoparticles raises the polarization response from 0.085 C/m{sup}2 the neat terpolymer to more than 0.11 C/m{sup}2 in the nanocomposites. Consequently, a high energy density of 10.5 J/cm{sup}3 can be achieved under a lower field in the nanocomposites compared with the neat terpolymer. Similarly, in P(VDF-TrFE-CFE) terpolymer/poly(vinylidene fluoride-chlorotrifluoroethylene) (PVDF-CTFE) copolymer blends with a small amount of copolymer (5 and 10 wt% copolymer), the improvement of energy density was also observed due to the improvement of the breakdown field in of the blends.