期刊
ADVANCED ELECTRONIC MATERIALS
卷 -, 期 -, 页码 -出版社
WILEY
DOI: 10.1002/aelm.202300333
关键词
DFT calculations; energy harvesting; polytetrafluoroethylene; triboelectrification; triboelectric nanogenerators
The lack of theoretical understanding of triboelectrification has hindered the development of energy harvesting technologies like triboelectric nanogenerators. A model predictive of the triboelectric behavior of polytetrafluoroethylene is formulated, driving the development of improved nanogenerators. By using a combined computational-experimental approach, it is shown that defluorination enhances the triboelectric charging of polytetrafluoroethylene at the nanoscale, leading to a one-order-of-magnitude output increase in triboelectric nanogenerators.
The lack of theoretical understanding of triboelectrification has hindered the development of energy harvesting technologies like triboelectric nanogenerators. Focusing on polytetrafluoroethylene, a material with a strong triboelectric output, a model predictive of its triboelectric behavior, driving the development of improved nanogenerators are formulated. With a combined computational-experimental approach it is shown that defluorination enhances polytetrafluoroethylene nanoscale triboelectric charging. Then a model, explaining the macroscale triboelectric output as determined by the competition of two mechanisms is developed. Defluorination enhances charging while also reducing the interface gap, favoring the backflow of electrons, and possibly reducing charging. However, numerical analysis shows that backflow is negligible, aligning with the prediction of increased triboelectric output. By building triboelectric nanogenerators with defluorinated polytetrafluoroethylene samples, achieved by X-ray irradiation, a one-order-of-magnitude output increase is demonstrated. The predictive models, supported by experiments, lead to an improved strategy for designing effective energy harvesting devices and new applicative breakthroughs. Density functional theory calculations and theoretical modeling show that polytetrafluoroethylene (PTFE) triboelectric properties can be highly enhanced by defluorination, which can be experimentally obtained by X-ray irradiation. Triboelectric measurements validate the prediction and prove its generality by pairing PTFE with both metals and polymers, demonstrating the power of theoretical modeling to facilitate applicative breakthroughs.image
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据