Mechanism and regulation of peeling-electrification in adhesive interface

Peeling the adhesion interface is a common contact-separation process at the interface, but harvesting and effectively regulating the mechanical energy remains a challenge. Herein, we designed a new protocol triboelectric nanogenerator based on interfacial adhesion-peeling behavior (AP-TENG). The basic relationship between adhesion force and peeling current reveals that rapid jumping out of contact of the adhesion interface enhanced peeling electrification. Also, the design of the grid structure allows for rapid separation of the adhesion interface. The current of AP-TENG during peeling is approximately four times larger than that of the flat surface, allowing for the monitoring of interface fracture. In the rolling mode, AP-TENG can peel the adhesive tape from the surface of the substrate at a very small angle, resulting in a shocking current of up to about 15 μA. The present results confirm the role of adhesion in triboelectricity and expand the potential applications of adhesive materials for energy harvesting.