Achieving Remarkable Charge Density via Self‐Polarization of Polar High‐k Material in a Charge‐Excitation Triboelectric Nanogenerator

is obtained with 7 µm homemade lead zirconate titanate-poly(vinylidene fluoride) composite film in the atmosphere with 5% relative humidity, which is the highest charge density for TENGs with high durability currently. This work provides new guidance for dielectric material optimization under charge excitation to boost the output performance of TENGs toward practical applications.