fig13

Figure 13. Dielectric and energy storage properties of PI nanocomposites: (A) ε_r/loss vs. filler content (25 °C, 1kHz); (B) Weibull E_b and (C) U_e at 150 °C; (D) Simulated current density vs. filler content/E-field (Al₂O₃/HfO₂/ TiO₂, 150 °C)^[101]. PI: Polyimide ε_r: dielectric constant; E_b: electrochemical breakdown; U_e: energy storage density.