Zheng Yang, Liu Tong, Wu Junpeng, Xu Tiantian, Wang Xiandi, Han Xun, Cui Hongzhi, Xu Xiaofeng, Pan Caofeng, Li Xiaoyi
School of Materials Science and Engineering, Ocean University of China, Qingdao, 266100, China.
CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, P. R. China.
Adv Mater. 2022 Jul;34(28):e2202238. doi: 10.1002/adma.202202238. Epub 2022 Jun 6.
The triboelectric nanogenerator (TENG) is an emerging technology that offers excellent potential for the conversion of mechanical energy from rain into electricity for hybrid energy applications. However, a high-performance TENG is yet to be achieved because a quantitative analysis method for the energy conversion process is still lacking. Herein, a quantitative analysis method, termed the "kinetic energy calculation and current integration" (KECCI) method, which significantly improves the understanding of the mechanical-to-electrical energy conversion process, is presented. Based on the KECCI method, a high-performance TENG is developed by systematically optimizing a biomimetic surface structure and instant switch design, with 1.25 mA short-circuit current (I ), 150 V open-circuit voltage (V ), and a high energy-conversion efficiency of 24.89%. Furthermore, a multilayered TENG device is proposed for continuously harvesting the kinetic energy of raindrops for further improvement in the energy-conversion efficiency. Finally, the multilayered TENGs are integrated with organic photovoltaics, achieving all-weather energy harvesting. This work presents a validated theoretical basis that will guide further development of TENGs toward higher performances, which will promote the commercialization of hybrid TENG systems for all-weather applications.
摩擦纳米发电机（TENG）是一项新兴技术，在将雨水的机械能转化为电能以用于混合能源应用方面具有巨大潜力。然而，由于仍缺乏能量转换过程的定量分析方法，高性能的TENG尚未实现。在此，我们提出了一种定量分析方法，称为“动能计算与电流积分”（KECCI）方法，该方法显著增进了对机械能向电能转换过程的理解。基于KECCI方法，通过系统优化仿生表面结构和即时开关设计，开发出了一种高性能TENG，其短路电流（I）为1.25 mA，开路电压（V）为150 V，能量转换效率高达24.89%。此外，还提出了一种多层TENG装置，用于持续收集雨滴的动能，以进一步提高能量转换效率。最后，将多层TENG与有机光伏器件集成，实现全天候能量收集。这项工作提供了一个经过验证的理论基础，将指导TENG朝着更高性能进一步发展，这将推动混合TENG系统在全天候应用中的商业化。
