Ionic Liquid and PVDF Composite Films for Triboelectric Nanogenerator

The output of a triboelectric nanogenerator using a composite film consisting of a small amount of ionic liquid (IL) and polyvinylidene fluoride (PVDF) was evaluated. The IL concentration ranged from 0 to 50 ppm. The output reached a maximum at the IL concentration of 20 ppm, and then decreased when concentration exceeded 20 ppm. The charge density depth distribution caused by the contact separation of the PVDF composite film was measured by the pulsed electroacoustic method. The IL addition is increased the charge density, and thus the power output.