Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University , Seoul 08826, Korea.
Department of Chemistry, Yonsei University , 50, Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea.
J Am Chem Soc. 2017 Aug 16;139(32):10968-10971. doi: 10.1021/jacs.7b05030. Epub 2017 Aug 4.
Recently, various energy transducers driven by the relative motion of solids and liquids have been demonstrated. However, in relation to the energy transducer, a proper understanding of the dynamic behavior of ions remains unclear. Moreover, the energy density is low for practical usage mainly due to structural limitations, a lack of material development stemming from the currently poor understanding of the mechanisms, and the intermittently generated electricity given the characteristics of the water motion (pulsed signals). Here, we verify a hypothesis pertaining to the ion dynamics which govern the operation mechanism of the transducer. In addition, we demonstrate enhanced energy transducer to convert the mechanical energy of flowing water droplets into continuous electrical energy using an electrolyte-insulator-semiconductor structure as a device structure. The output power per droplet mass and the ratio of generated electric energy to the kinetic energy of water drops are 0.149v mW·g·m·s and 29.8%, respectively, where v is the speed of the water droplet.
最近，已经展示了各种由固液相对运动驱动的能量转换器。然而，就能量转换器而言，离子的动态行为仍然没有得到很好的理解。此外，由于结构限制、目前对机制的理解不足导致材料开发缺乏，以及水运动（脉冲信号）的间歇性发电，其能量密度对于实际应用来说较低。在这里，我们验证了一个与控制转换器工作机制的离子动力学有关的假设。此外，我们使用电解质-绝缘体-半导体结构作为器件结构，展示了增强型能量转换器，将流动水滴的机械能转换为连续电能。每个液滴质量的输出功率和产生的电能与水滴动能的比值分别为 0.149v mW·g·m·s 和 29.8%，其中 v 是水滴的速度。
