Study of vibrational droplet triboelectric nanogenerator on structural and operational parameters

Structural parameter, such as device structure, and operational parameters, such as load resistance and droplet arrangement, were studied on the vibrational droplet triboelectric nanogenerators. Single-droplet devices with different structures were tested and theoretically analyzed. It is discovered that the device structure influences the output power by changing the triboelectric charge and the tribo/inductive capacitance ratio. The dependence of the optimal load resistance on the droplet number and the vibration frequency was experimentally studied with parallel-droplet devices. Calculations were performed to quantify the relationship between the optimal load resistance and the influential factors. The output performance of the serial-droplet device was measured and compared with that of the single-droplet and parallel-droplet devices. It is found that their output performance is significantly affected by the parasitic capacitance.