Yu Mingyu, Yu Di, Hua Yongzhi, Wang Yu, Liu Jiuqing, Xie Zhijie
College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150042, China.
China Academy of Launch Vehicle Technology, Beijing 100076, China.
ACS Omega. 2023 Jan 20;8(4):3842-3849. doi: 10.1021/acsomega.2c06117. eCollection 2023 Jan 31.
As a new energy harvesting technology, triboelectric nanogenerators are widely used for vibration mechanical energy harvesting. However, the current schemes ignore the composite characteristics of vibration, with problems such as utilization and low collection efficiency. In this paper, a random resonance cantilever beam triboelectric nanogenerator (RCB-TENG) with dual-mode coupled is presented, the working mode is a coupling form of in-plane sliding and vertical contact-separation that can effectively collect complex vibration energy in transverse and longitudinal directions. The influences of the structural parameters of the RCB-TENG and different dielectric materials on the output performance are systematically investigated. The single vibration module achieved a power density of 463.56 mW/m and a transfer charge of 10.7 μC at a vibration frequency of 46 Hz, an increase in power density, and a transfer charge of 4.94 and 3.82 times, respectively, compared to the conventional contact-separation mode. Finally, the RCB-TENG was tested in practice, and it was observed that nine 1 W commercial LED bulbs and 500 5 mm diameter LED lamps were successfully lit. This work offers new ideas for distributed energy harvesting technologies and holds broad promise in the field of energy harvesting from wind, water, wave, and random vibrations caused by mechanical energy.
作为一种新型的能量收集技术，摩擦纳米发电机被广泛应用于振动机械能收集。然而，目前的方案忽略了振动的复合特性，存在利用率低和收集效率低等问题。本文提出了一种具有双模耦合的随机共振悬臂梁摩擦纳米发电机（RCB-TENG），其工作模式为面内滑动和垂直接触-分离的耦合形式，能够有效收集横向和纵向的复杂振动能量。系统研究了RCB-TENG的结构参数和不同介电材料对输出性能的影响。在振动频率为46 Hz时，单振动模块实现了463.56 mW/m的功率密度和10.7 μC的转移电荷，与传统接触-分离模式相比，功率密度和转移电荷分别提高了4.94倍和3.82倍。最后，对RCB-TENG进行了实际测试，观察到九个1 W的商用LED灯泡和500个5毫米直径的LED灯被成功点亮。这项工作为分布式能量收集技术提供了新思路，在从风、水、波浪以及机械能引起的随机振动中收集能量的领域具有广阔前景。
