Apr 10, 2025
5:00pm - 7:00pm
Summit, Level 2, Flex Hall C
Agha Jan1
Pohang University of Science and Technology1
Functional implementation of triboelectric nanogenerators (TENGs) in self-powered sensing and energy harvesters is often limited by the requirement for a broad working range, high sensitivity, high output power, and structural flexibility. Recent research has mainly focused on surface modifications to improve the surface charge generation of TENG, enhancing charge storage capability of TENG can further boost its efficiency. In this work, we present a flexible TENG design incorporating a micro-dome structure made of Ecoflex as the tribo-negative layer with a dielectric enhancement layer of carbon black/Ecoflex nanocomposite. The composite layer increases output voltage by creating micro-capacitors within the dielectric material. Additionally, fluorocarbon plasma treatment of the micro-dome array boosts surface energy, improving interactions between layers and leading to higher output voltage, achieving a power density of 197.4 mW/m
2. The TENG demonstrated decent pressure sensitivities of 2.57 V/kPa in the low-pressure range (0.612–8.58 kPa) and 1.70 V/kPa in the high-pressure range (8.58–20.83 kPa). The TENG sensor was integrated into shoe insoles for real-time gait analysis, providing insights into walking patterns. When connected in series, two TENGs produced the peak-peak voltage of 89.4 V, showcasing the TENG's potential for wearable self-powered sensing and energy harvesting applications.