作为液滴能量收集器微型化与大面积集成构建模块的摩擦电像素
Triboelectric Pixels as building blocks for microscale and large area integration of drop energy harvesters
AI总结：
针对液滴能量收集器输出功率低的问题，提出基于瞬时电容变化的微型摩擦纳米发电机，可高密度收集液滴电能，适配多场景且兼容多种摩擦电表面，为微型化与大面积集成提供支撑。
摘要：
开发水能这一清洁可再生能源的最终环节，在于利用液体流动低频段所蕴含的能量，这需要灵活的解决方案以适配从雨滴、海浪到管道水流、微型器件内水流等多种场景。因此，与太阳能、风能相比，低频流动能量收集是一个新兴概念，而摩擦纳米发电机（triboelectric nanogenerators）已被证实是该领域最具前景的核心技术。然而，尽管研究人员开展了大量尝试，液滴能量收集器的输出功率仍然偏低，主要原因在于兼具理想摩擦电特性与润湿特性的备选材料有限，且器件结构为非最优的厘米级尺寸，无法将撞击液滴的全部动能转化为电能。本文提出了一种微型摩擦纳米发电机，可通过单次亚毫秒级的持续步骤，从液滴中收集高密度电能。其工作机制依赖于液滴与电极活性区域高速接触时产生的瞬时电容变化。我们探讨了摩擦电表面的预充电效应对能量转换事件时间特性的作用。该器件的电容式微型结构具有小尺寸特点，可用于制备高密度集成阵列。所提出的结构可适配不同液体与不同规模，且与多种摩擦电表面兼容，包括柔性、透明及薄膜类方案。
英文摘要：
The ultimate step towards the exploitation of water as a clean and renewable energy source addresses the energies stored in the low frequencies of liquid flows, which demands flexible solutions to adapt to multiple scenarios, from raindrops to waves, including water moving in pipelines and microdevices. Thus, harvesting low-frequency flows is a young concept compared to solar and wind powers, where triboelectric nanogenerators have been revealed as the most promising relevant actors. However, despite widespread attempts by researchers, the drop energy harvesters' output power is still low, mainly because of the limitations in candidates endowed with ideal triboelectric and wetting properties and also the non-optimal and centimetre-scale device architecture that prevents the conversion of the complete kinetic energy of impinging drops. Herein, we disclose a microscale triboelectric nanogenerator that can harvest a high density of electrical power from drops through a single, submillisecond, long-lasting step. The mechanism relies on an instantaneous electrical capacitance variation owing to the high-speed contact of the drops with the electrodes' active area. We discuss the role of the precharged effect of the triboelectric surface in the time characteristic of the conversion event. The capacitive and microscale structure of the device is endowed with a small form factor that allows for the production of densely packed arrays. The proposed architecture can be adjusted to different liquids and scales and is compatible with a variety of triboelectric surfaces, including flexible, transparent, and thin-film approaches.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
