Cooperativity of Silver Nanostructures upon Electric Power Generation in Triboelectric Polyimide Layers

Abstract

Triboelectric nanogenerators possessing polymeric contact electrification layers have been a state‐of‐the‐art technology for portable and wearable applications, but the intrinsic low permittivity of polymers has posed a significant charge loss, limiting the electrical outputs from the nanogenerators. The incorporation of conductive fillers into the polymer matrix represents a promising route to enhance the dielectric constant of polymers while remaining the surface properties, but the geometric influence of fillers is yet to be uncovered. Herein, the cooperativity of silver nanostructures with differing geometry on triboelectric power generation in polyimide film layers is reported. Upon implementation of silver nanorods into a polymer film, the dielectric constant is improved a 2.5‐fold compared to the pristine polymer film, resulting in a remarkable enhancement of up to 830% in output power of the nanogenerators.

Advanced materials for triboelectric nanogenerator

“…(e) The interfacial polarisation in bilayer polymer films [34]. (f) The cooperativity of silver nanostructures with differing geometry [36]. (g) The hierarchical design strategy by additionally constructing a triboelectric coating on the high dielectric nanocomposites [37].…”

“…(e) Reprinted from [34], Copyright (2021), with permission from Elsevier. (f) [36] John Wiley & Sons. © 2022 Wiley-VCH GmbH.…”

Excellent-Moisture-Resistance Fluorinated Polyimide Composite Film and Self-Powered Acoustic Sensing

“…Polyimide (PI) is widely used in electrical, aerospace, microelectronics, and other fields because of its excellent dielectric properties, mechanical properties, and thermal stability, and it is also a common electronegative material for triboelectric nanogenerators (TENGs). − Some works enhanced the triboelectric performance of the PI film by fluorination and achieved excellent results. , However, the effect of humidity on the triboelectric performance of the PI film has also not been explored. Teflon AF is an amorphous fluoropolymer with excellent optical transparency and breathability, and the low surface energy and excellent charge injection property may provide solutions to the above problem. − …”

A Study of Contact Electrification Process on PVDF–Metal Interface: Effect of β Phase Composition

“…[13][14][15] Doping with carbon or metal based conductive fillers was used to enhance charge trapping ability of polymer layers. [16][17][18] Wang et. al.…”