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Hybrid film for liquid-solid contact-based energy harvesting systems
International Journal of Energy Research ( IF 4.6 ) Pub Date : 2021-09-17 , DOI: 10.1002/er.7283
Ahmed Fuwad 1 , Hyunil Ryu 2 , Tae‐Joon Jeon 2 , Sun Min Kim 1
Affiliation  

In the current digital era, portable low-power electronics have become an essential part of our daily life, from communication to traveling, surveillance, health care, education, and industry automation. However, conventional batteries cannot meet the requirements, such as portability and sustainability, of these systems; thus, new sustainable energy sources have been identified for energy harvesting for low-power electronics. Herein, we report a simple method to enhance the energy harvesting performance by combining two different conventional materials. Polydimethylsiloxane (PDMS) and polytetrafluoroethylene (PTFE) were mixed to fabricate a high-performance liquid-solid contact-based energy harvesting film. We optimized the energy harvesting performance by optimizing crucial factors such as the film thickness, charge transfer, and contact area as a function of the mixing ratio of PDMS and PTFE. Moreover, the addition of PTFE particles to PDMS changes the surface characteristics of the film by increasing the surface roughness and charge transfer performance and enhances the mechanical stability of the film. The device shows an output voltage of 50 V under normal operation with a power density of 67.5 μW/cm2 across a 2 MΩ resistance, which can light up 20 LEDs and charge a 1-μF capacitor up to 22.5 V in under 40 seconds. These results show that the hybrid film can generate high-power output per area with conventional materials and can be used for energy harvesting for different electronic devices. Furthermore, this study will provide new insights to improve the performance of conventional materials for energy harvesting by optimizing their properties, such as thickness and surface morphology, by mixing different materials.

中文翻译:

用于基于液固接触的能量收集系统的混合膜

在当前的数字时代,便携式低功耗电子产品已成为我们日常生活中必不可少的一部分,从通信到旅行、监控、医疗保健、教育和工业自动化。然而,传统电池无法满足这些系统的便携性和可持续性等要求;因此,已经确定了新的可持续能源用于低功率电子设备的能量收集。在这里,我们报告了一种通过结合两种不同的传统材料来提高能量收集性能的简单方法。将聚二甲基硅氧烷 (PDMS) 和聚四氟乙烯 (PTFE) 混合以制造高性能的液固接触能量收集薄膜。我们通过优化薄膜厚度、电荷转移、和接触面积作为 PDMS 和 PTFE 混合比的函数。此外,在 PDMS 中添加 PTFE 颗粒通过增加表面粗糙度和电荷转移性能来改变薄膜的表面特性,并增强薄膜的机械稳定性。该器件在正常工作时的输出电压为 50 V,功率密度为 67.5 μW/cm2跨 2 MΩ 电阻,可点亮 20 个 LED,并在 40 秒内将 1 μF 电容器充电至高达 22.5 V。这些结果表明,混合薄膜可以使用传统材料在单位面积上产生高功率输出,并可用于不同电子设备的能量收集。此外,这项研究将提供新的见解,通过混合不同的材料来优化传统材料的性能,例如厚度和表面形态,从而提高能量收集材料的性能。
更新日期:2021-09-17
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