Harvesting electricity from water has been recognized as an effective way to deal with the increasing energy shortage. The nanogenerators made from carbon nanomaterials have been widely studied to harvest energy from various forms of water. However, its electric generation is usually not sufficient for practical applications. Here, we develop a flexible fiber fluidic nanogenerator based on aligned carbon nanotube/transition metal oxide composite film. An open-circuit voltage of 0.31 V combined with an output power of 30 mW/m² had been produced when the fluidic nanogenerator was inserted into saline solution. The output power is superior to the majority of previous hydroelectric generators based on carbon nanomaterials. A stable output voltage of 1.8 V could be further achieved by connecting fiber generators in series. The enhanced electricity generation after introduction of transition metal oxides is attributed to the intensified charge unbalance at the interfacial electric double layer between the carbon nanotube and aqueous solution, which provides a new way for creating high-performing hydroelectric generators.

中文翻译：

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由碳纳米管与过渡金属氧化物复合制成的纤维流体纳米发电机

从水中获取电力已被公认为应对日益严重的能源短缺的有效方法。由碳纳米材料制成的纳米发电机已被广泛研究以从各种形式的水中获取能量。然而，其发电量通常不足以满足实际应用。在这里，我们开发了一种基于定向碳纳米管/过渡金属氧化物复合膜的柔性纤维流体纳米发电机。开路电压为 0.31 V，输出功率为 30 mW/m ²当流体纳米发电机插入盐水溶液时已经产生。输出功率优于以往大多数基于碳纳米材料的水力发电机。通过串联光纤发生器，可以进一步实现 1.8 V 的稳定输出电压。引入过渡金属氧化物后增强的发电量归因于碳纳米管和水溶液之间界面双电层处的电荷不平衡加剧，这为制造高性能水力发电机提供了新途径。