Triboelectric charge transfer theory driven by interfacial thermoelectric effect

TL;DR

This paper develops a quantitative theory for triboelectric charge transfer driven by interfacial thermoelectric effects, explaining steady-state charge distribution and its implications for static electricity and energy harvesting.

Contribution

It introduces a detailed model linking thermoelectric bias to triboelectric charge transfer, providing quantitative insights into static charge distribution and electrostatic interactions.

Findings

Triboelectric charge forms a delta-like distribution at steady state.

Transferred charge equals half the difference of thermoelectric surface charges.

Surface charge inhomogeneity influences static discharge and adhesion.

Abstract

Despite extensive study and the practical significance of friction-driven static electricity, a quantitative triboelectric charge transfer theory has yet to be established. Here, we elucidate the detailed dynamics of triboelectric charge transfer driven by interfacial thermoelectric bias maintaining a steady state at the interface. We demonstrate that triboelectric charge exists in a delta-like distribution at a steady state. We suggest that the transferred triboelectric charge is dictated by half of the difference between thermoelectrically induced surface charges. Moreover, we quantitatively discuss electrostatic adhesion and static discharge between the transferred charges, which we may experience every day, including the role of surface charge inhomogeneity. Our findings may have significant implications for applications ranging from static electricity phenomena to advanced energy harvesting devices.