Natural silk-composite enabled versatile robust triboelectric nanogenerators for smart applications
Natural silk-composite enabled versatile robust triboelectric nanogenerators for smart applications
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DOI：
10.1016/j.nanoen.2021.105819
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发表时间：
2021-02-06
期刊：
影响因子：
17.6
通讯作者：
Yu, Jae Su
中科院分区：
文献类型：
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作者：
Dudem, Bhaskar;Graham, Sontyana Adonijah;Yu, Jae Su
最大化摩擦电层表面电荷密度同时保护其免受湿度影响的策略在将摩擦电纳米发电机（TENG）用于商业/实时应用中至关重要。在本文中，我们首次提出利用结晶丝微粒（SMP）来提高聚乙烯醇等材料的表面电荷密度，以实现其对TENG器件的适用性。此外，这些SMPs是从废弃的家蚕蚕茧中提取的，通过简单，廉价，一步碱水解处理。我们研究了这些复合材料的性能与反材料组成的废聚四氟乙烯塑料杯，以显示在回收产品中的再利用。从回收材料开发的TENG加工成本不仅低，而且环保。TENG性能作为一个功能的SMPs的浓度进行了研究，并与复合材料的功函数和表面电位进行了比较，与距离依赖的电场理论模型，以优化性能。因此，优化后的TENG的最大输出电压、电流、电荷和功率密度分别接近280 V、17.3 mu A、32.5 nC和14.4 W.m（-2），是一款极具竞争力的能量采集器，可满足可穿戴设备和移动的应用的严格需求。此外，完全封装的硅橡胶器件可保护其免受潮湿的影响，并使器件具有柔软、舒适和皮肤友好的界面，可用于实际应用。
Strategies to maximize the surface charge density across triboelectric layers while protecting it from humidity are crucial in employing triboelectric nanogenerators (TENGs) for commercial/real-time applications. Herein, for the first time, we propose the utility of crystalline silk microparticles (SMPs) to improve the surface charge density in materials like polyvinyl alcohol to realise its applicability for TENG devices. Moreover, these SMPs are extracted from discarded Bombyx mori silkworm cocoons by facile, inexpensive, and single-step alkaline-hydrolysis treatment. We examine the performance of these composites with counter-materials composed of waste PTFE plastic cups to show reuse in recycled products. The processing cost of TENG developed from recycled materials is not only low but eco-friendly. The TENG performance as a function of the concentration of SMPs is investigated and compared with the composite's work-function and surface-potentials, with the distance-dependent electric field theoretical model employed to optimize the performance. Consequently, the optimized TENG exhibits maximum output voltage, current, charge, and power density of similar to 280 V, 17.3 mu A, 32.5 nC, and 14.4 W.m(-2), respectively, creating a highly competitive energy harvester that can conform to the rigorous needs of wearables and mobile applications. Furthermore, the fully packaged silicone rubber device protects it from humidity and enables the device utility for practical applications with a soft, comfortable, and skin-friendly interface.