April 7 - 11, 2025
Seattle, Washington
Symposium Supporters
2025 MRS Spring Meeting & Exhibit
EL16.13.19

Performance Enhancement of Wearable Triboelectric Pressure Sensor with Micro-Dome Structures and Nanocomposite Dielectric Layer

When and Where

Apr 10, 2025
5:00pm - 7:00pm
Summit, Level 2, Flex Hall C

Presenter(s)

Co-Author(s)

Agha Jan1

Pohang University of Science and Technology1

Abstract

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/m2. 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.

Keywords

lithography (removal)

Symposium Organizers

Xudong Wang, University of Wisconsin--Madison
Miso Kim, Sungkyunkwan University
Wenzhuo Wu, Purdue University
Till Fromling, Technical University of Darmstadt

Symposium Support

Bronze
APL Electronic Devices

Session Chairs

Ruoxing Wang
Wenzhuo Wu

In this Session