한빛사논문
Hongseok Jo1, Dogun Park1,2, Minkyeong Joo1,2, Daekyu Choi1,2, Jisong Kang3,4, Jeong-Myeong Ha4,5, Ki Hyun Kim6, Kwang Ho Kim4,7,8, Seongpil An1,2,9,10
1SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), Suwon, South Korea
2Department of Nano Science and Technology, Sungkyunkwan University (SKKU), Suwon, South Korea
3Department of Chemical and Biological Engineering, Korea University, Seoul, South Korea
4Clean Energy Research Center, Korea Institute of Science and Technology (KIST), Seoul, South Korea
5Division of Energy and Environment Technology, KIST School, University of Science and Technology, Seoul, South Korea
6School of Pharmacy, Sungkyunkwan University (SKKU), Suwon, South Korea
7KIST-SKKU Carbon-Neutral Research Center, Sungkyunkwan University (SKKU), Suwon, South Korea
8School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon, South Korea
9Department of Nano Engineering, Sungkyunkwan University (SKKU), Suwon, South Korea
10Department of Semiconductor Convergence Engineering, Sungkyunkwan University (SKKU), Suwon, South Korea
Hongseok Jo, Dogun Park, and Minkyeong Joo contributed equally to this study.
CorrespondenceKi Hyun Kim, Kwang Ho Kim, Seongpil An
Abstract
Eco-friendly and sustainable energy harvests that can alleviate concerns on the energy crisis and environmental pollution are in demand. Exploiting nature-derived biomaterials is imperative to develop these carbon-neutral energy harvesters. In this study, lignin/polycaprolactone nanofiber (NF)-based triboelectric nanogenerators (TENGs) are fabricated using an electrospinning technique. Nanotextured morphology of electrospun lignin/polycaprolactone NFs and wettability modification of lignin into hydrophilicity can significantly enhance electron transfer between tribopositive and tribonegative materials, resulting in the highest energy-harvesting efficiency in their class. The output voltage of the lignin-based TENG exceeds 95 V despite relatively low tapping force of 9 N and frequency of 9 Hz. Various mechanical and physicochemical characterizations, including scanning electron microscopy, nuclear magnetic resonance spectroscopy, x-ray diffraction analysis, Fourier transform infrared analysis, and atomic force microscopy, are performed, confirming the mechanical durability, biocompatibility, and industrial viability of lignin-based TENG developed here.
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