Liquid-solid-based triboelectric nanogenerators (LS-TENG) are new tools for collecting energy from water in nature. Recent efforts have been made on LS-TENG based on superhydrophobic surfaces with faster sliding speed of water droplets and more efficient LS separation comparing to the hydrophobic ones, resulting in higher energy output performance. However, there is a tradeoff between sliding speed and LS contact area. Solving this tradeoff will raise both the output capability and energy conversion efficiency. In this study, we demonstrate a new TENG based on liquid-organogel (LG) interface. By introducing organogel as the triboelectric layer, a new slippery contact mode is established between water droplets and organogel. In physical chemistry, the slippery contact is applauded for the high sliding speed and large contact area, which creates an opportunity for our current task. During sliding of a water droplet on LG-TENG, the electrostatic induction yielded a transferred charge of ∼12 nC per droplet, which is 3 times greater than that from control experiment based on LS-TENG. In despite of the high output performance, the LG-TENG is of low-cost and up-scalability, which make it a ready candidate for harvesting distributed energy from natural resources on the vast outdoor facilities.

液固基摩擦纳米发电机 (LS-TENG) 是从自然界中的水中收集能量的新工具。最近已经在基于超疏水表面的 LS-TENG 上做出了努力，与疏水表面相比，水滴的滑动速度更快，LS 分离更有效，从而产生更高的能量输出性能。然而，滑动速度和 LS 接触面积之间存在权衡。解决这种权衡将同时提高输出能力和能量转换效率。在这项研究中，我们展示了一种基于液体-有机凝胶 (LG) 界面的新型 TENG。通过引入有机凝胶作为摩擦电层，在水滴和有机凝胶之间建立了一种新的光滑接触模式。在物理化学中，滑接触以高滑动速度和大接触面积而受到称赞，这为我们当前的任务创造了机会。在水滴在 LG-TENG 上滑动期间，静电感应产生每滴约 12 nC 的转移电荷，这是基于 LS-TENG 的对照实验的 3 倍。尽管输出性能高，但 LG-TENG 具有低成本和可扩展性，这使其成为从大型户外设施的自然资源中收集分布式能源的现成候选者。