fig4
Figure 4. Breakdown statistics and energy-storage performance of P(VDF-TrFE-CFE)/PMMA blend films. (A) Weibull distribution of breakdown strength for films with different compositions; (B) characteristic breakdown strength Eb obtained from Weibull fitting; (C) unipolar P-E loops of the P(VDF-TrFE-CFE)/PMMA 50/50 wt.% film under different applied electric fields and the corresponding energy-storage parameters (Ue, U, η); (D) maximum polarization Pmax, remanent polarization Pr, and polarization difference for films with different compositions; (E) electric-field-dependent discharged energy density and energy-storage efficiency for films with different compositions; (F) Young’s modulus of films with different compositions. P-E: Polarization-electric field; P(VDF-TrFE-CFE): poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene); PMMA: poly(methyl methacrylate); CFE: abbreviation of P(VDF-TrFE-CFE); Pmax: maximum polarization; Pr: remanent polarization; Ue: discharged energy density; U: total energy density; η: energy-storage efficiency.
