The Evolution of 3D Printing in Biomechanical Energy Harvesting: A Focus on Triboelectric Nanogenerator Design and Conductivity

Abstract

This study investigates the development and optimization of 3D-printed triboelectric nanogenerators (TENGs) for future biomechanical energy harvesting applications. Utilizing stereolithography (SLA) 3D printing technology, three distinct microstructural designs—arches, pyramids, and cylinders—were studied and analysed. These structures were then enhanced with a spray coating of an optimized poly(3,4-ethylenedioxythiophene) sulfonate (PEDOT) solution to improve their conductivity. A comprehensive evaluation of voltage output and mechanical stability revealed that arch structures outperformed the other geometries due to their superior mechanical properties and energy harvesting efficiency. The curved geometry of arches allowed for efficient stress distribution and maximized contact area, leading to higher charge generation through the triboelectric effect. Furthermore, the PEDOT coating significantly enhanced the electrical performance by improving surface conductivity and ensuring effective charge transfer. These findings demonstrate the potential of 3D-printed TENGs with arch structures as viable, sustainable, and efficient power sources for biomedical devices, providing a promising pathway toward advanced healthcare technologies. The study underscores the importance of geometric design and material optimization in the development of high-performance TENGs for diverse applications.

Date of Award	2 Jul 2024
Original language	American English
Supervisor	Anna-Maria Pappa (Supervisor)