A three-dimensional integrated nanogenerator for effectively harvesting sound energy from the environment

作者：Liu, Jinmei; Cui, Nuanyang; Gu, Long; Chen, Xiaobo; Bai, Suo; Zheng, Youbin; Hu, Caixia; Qin, Yong^*

来源：Nanoscale, 2016, 8(9): 4938-4944.

DOI：10.1039/c5nr09087c

• TRIBOELECTRIC NANOGENERATOR
• HELMHOLTZ RESONATORS
• VIBRATION
• PERFORMANCE
• FREQUENCY
• PRESSURE
• SENSORS
• CHARGE

An integrated triboelectric nanogenerator (ITNG) with a three-dimensional structure benefiting sound propagation and adsorption is demonstrated to more effectively harvest sound energy with improved output performance. With different multifunctional integrated layers working harmonically, it could generate a short-circuit current up to 2.1 mA, an open-circuit voltage up to 232 V and the maximum charging rate can reach 453 mu C s(-1) for a 1 mF capacitor, which are 4.6 times, 2.6 times and 7.4 times the highest reported values, respectively. Further study shows that the ITNG works well under sound in a wide range of sound intensity levels (SILs) and frequencies, and its output is sensitive to the SIL and frequency of the sound, which reveals that the ITNG can act as a self-powered active sensor for real-time noise surveillance and health care. Moreover, this generator can be used to directly power the Fe (OH)(3) sol electrophoresis and shows great potential as a wireless power supply in the electrochemical industry.

• 出版日期2016
• 单位兰州大学