미세패터닝 및 압전물질 혼합을 통한 마찰전기 에너지하베스터 성능 향상에 관한 연구

Abstract

ABSTRACT

A Synergistic Integration of BaTiO3/PDMS Pyramidal Structure Film for Tribo-piezoelectric Energy Harvester Junsu Seong Dept. of Photonics and Nanoelectronics The Graduate School Hanyang University

Recently, piezoelectric and triboelectric nanogenerators (PENGs, TENGs) are rising as one of the promising strategies for energy harvesting due to an efficient design that converts mechanical movements such as human body motion, pressure, and strain into electricity. Also, the TENGs have the advantages of high output performance, simple structure, and low cost. Various materials have been investigated as friction materials to improve the power density produced by the TENGs. However, using a pristine triboelectric materials is unsuitable since they exhibit low sensitivity and output power. Here, we fabricated a highly sensitive hybrid TENG in the wide press-detecting range through the micro-patterning and combining piezoelectric nanoparticles. Our TENG device consisting of a polydimethylsiloxane (PDMS)-based triboelectric material and BaTiO3 piezoelectric nanoparticles exhibits an outstanding electrical performances with an open-circuit voltage of 372.4 V, short-circuit current of 81.3 μA, and power density of 1.5 mW cm-2 under the pressure condition of 100 kPa and frequency of 1 Hz. In addition, we fabricated a self-powered tactile sensor using optimized composite film, and the tactile sensor detected environmental motions and human movements such as water droplets, wind, human wrist pulse, etc. Therefore, we demonstrated that the electrical performance of our TENG is dramatically enhanced by increasing surface area and adding piezoelectric materials into the PDMS matrix. The micropyramidal hybrid TENG can be used for next-generation energy harvesting devices for wearable electronics.