Triboelectric nanogenerator

Exhibitor: MING CHI UNIVERSITY OF TECHNOLGY

Booth No: N116

Characteristic

Friction layers composed of polyimide (PI) and MoO3/PVDF-HFP nanofibers are utilized as components. When PI and MoO3/PVDF-HFP come into contact under applied force, surface charges are induced. However, as these surface charges possess opposite polarities but reside on the same plane, no electrical output is generated. Upon removal of the applied force, the charges transfer between the two frictional materials through an external circuit, generating an electrostatic potential difference, resulting in a positive electrical signal. When the two frictional layers completely separate, zero potential difference is attained in equilibrium. However, when PI and MoO3/PVDF-HFP mutually repel under applied force, a reverse electrostatic potential difference is produced, leading to the generation of a negative signal. Therefore, the operational principle of the frictional nanogenerator is based on the alternating voltage and current generated by the regulated contact and separation of the frictional layers, and we can determine the repair status of joints and measure pulses under different waveform patterns by analyzing the peaks of the electrical output and utilizing big data.