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Fiber-Shaped Fluidic Nanogenerator with High Power Density for Self-Powered Integrated Electronics
Cell Reports Physical Science ( IF 8.9 ) Pub Date : 2020-08-19 , DOI: 10.1016/j.xcrp.2020.100175
Jie Yang , Chao Yang , Jianli Cheng , Alvin Dai , Tongchao Liu , Yifei Yuan , Kunkun Guo , Dingwang Yuan , Bin Wang , Jun Lu

Flow-based hydrovoltaic nanogenerators have attracted particular attention as efficient and facile miniature energy-harvesting devices. However, they deliver relatively low output power density and limited power conversion efficiency owing to inefficient charge separation and poor charge accumulation. Here, we report the fabrication of high-performance, fiber-shaped fluidic nanogenerators (FFNGs) that use MoS2-encapsulated C fibers. The FFNGs deliver stable output voltages of 540 mV and an ultrahigh power density of 10.8 W m−2. With experiments and density functional theory calculations, improvements in output performance can be attributed to smaller energy requirements for Na+ cation adsorption, increased charge separation, and diffusion layer formations on the near surface. Moreover, self-powered, integrated devices achieve a maximum total power conversion-storage efficiency of ∼11% and stable output voltage up to 3.1 V, which is applicable for use in consumer electronics devices.



中文翻译:

高功率密度纤维状流体纳米发电机,用于自供电集成电子产品

基于流量的水力发电装置作为高效,便捷的微型能量收集装置受到了特别的关注。然而,由于无效的电荷分离和不良的电荷积累,它们提供了相对较低的输出功率密度和有限的功率转换效率。在这里,我们报告使用MoS 2封装的C纤维的高性能纤维状流体纳米发电机(FFNG)的制造。FFNG提供540 mV的稳定输出电压和10.8 W m -2的超高功率密度。通过实验和密度泛函理论计算,可以将输出性能的提高归因于Na +所需的较小能量阳离子吸附,增加电荷分离,并在近表面形成扩散层。此外,自供电的集成设备可实现约11%的最大总功率转换存储效率和高达3.1 V的稳定输出电压,适用于消费电子设备。

更新日期:2020-09-23
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