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Baik, Jeong Min
Nano Energy and Environmental Materials Lab
Research Interests
  • Nanogenerators, antimicrobial material, catalysis, smart sensors

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High humidity- and contamination-resistant triboelectric nanogenerator with superhydrophobic interface

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Title
High humidity- and contamination-resistant triboelectric nanogenerator with superhydrophobic interface
Author
Zhou, QitaoLee, KyunghunKim, Kyeong NamPark, Jun GyuPan, JingBae, JuyeolBaik, Jeong MinKim, Taesung
Issue Date
2019-03
Publisher
ELSEVIER SCIENCE BV
Citation
NANO ENERGY, v.57, pp.903 - 910
Abstract
Triboelectric nanogenerators (TENGs) have been widely used in the recent years to harvest and convert mechanical energy to electrical energy. With the improved performance of TENGs, their stability and robustness in harsh environments have attracted increasing attention as a next challenge. We present herein a superhydrophobic interlayer-integrated TENG that exhibits high performance against humidity and environmental contamination. We used particle lithography to prepare a superhydrophobic interlayer with a three-dimensional (3D), hierarchical, porous pattern, resulting in a high static water contact angle of 161°. This 3D, hierarchical superhydrophobic interlayer played a key role in improving the TENG output performance. In addition, the TENG not only retained up to 86% of its initial electrical output at a high relative humidity of 80%, but also recovered much faster than a TENG with a regular flat interface under the same wet conditions. Finally, we found that the TENG was very robust against external contamination, maintaining approximately 88% of the initial output after five cycles of particulate contamination and washing in water, indicating that the TENGs with a superhydrophobic, 3D, hierarchical interlayer could be used for powering Internet-of-things devices that are exposed to harsh environments, such as highly humid ones with dense particulate matters.
URI
https://scholarworks.unist.ac.kr/handle/201301/25823
URL
https://www.sciencedirect.com/science/article/pii/S2211285518310048?via%3Dihub
DOI
10.1016/j.nanoen.2018.12.091
ISSN
2211-2855
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