MoS2-Doped Polyvinyl Alcohol Nanofiber Films Via Electrospinning for High-Performance Triboelectric Nanogenerators
Year: 2025
Type: preprint
Abstract: Electrospinning enables the fabrication of nanofiber films with large active surface area, high porosity, and controllable filler orientation, offering distinct advantages for fabricating high-performance triboelectric nanogenerators (TENGs). Here, we develop MoS2-doped electrospun polyvinyl alcohol (PVA) films for TENG fabrication and reveal the underlying mechanisms of their enhanced triboelectric performance. Compared with spin-coated films, electrospun films intrinsically deliver higher output due to their fibrous morphology, while incorporation of MoS2 nanosheets further improves the performance. TENG with the optimized 2 wt.% MoS2-PVA electrospun film reached 994.0 V, 111.0 mA·m-2, and 136.3 μC·m-2, corresponding to 3.8, 3.8, and 3.0 folds enhancements over the spin-coated pristine PVA TENG. Mechanistic studies by experiments and theoretical analysis showed that this remarkable enhancement arises from the combined effects of morphology driven enlargement of effective contact area, MoS2 induced surface charge modulation, and nanosheet alignment induced piezoelectric polarization. Detailed material characterizations, COMSOL simulations, and molecular dynamic calculations provide quantitative and atomistic insights into these contributions. These results establish a coherent structure-property-performance relationship and provide design rules for durable, biocompatible, and high output TENGs, highlighting their promise for wearable energy harvesting and self-powered sensing applications.
Authors: Chuanrui Chen, Jiaqi Lu, Dinku Hazarika, Kaihang Zhang, Jianhui Wu, Jiafeng Ni, Rui Wan, Liangquan Xu, Jie Li, Xinyu Cai, Xi Yang, Fengling Zhuo, Hao Jin, Zhi Ye, Shurong Dong, Jikui Luo
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
OpenAlex ID: W4414555003
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