Affiliation:
1. College of Mathematics and Physics Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power Shanghai University of Electric Power Shanghai 200090 P. R. China
2. 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 100083 P. R. China
3. School of Nanoscience and Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
4. School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332‐0245 USA
5. Yonsei Frontier Lab Yonsei University Seoul 03722 Republic of Korea
Abstract
AbstractIn recent years, liquid–solid triboelectric nanogenerator (LSTENG) has attracted great attention. However, its low average power density and long charging time limit the practical application of this technique. Here, for the first time, a liquid–solid triboelectric nanogenerator combined with external charge‐pumping method (ECP‐LSTENG) is proposed. Compared to traditional LSTENGs, a charge storage capacitor is added in this ECP‐LSTENG to store the output charges from the pumping generator. Then, a charge extraction capacitor is formed by the spreading and shrinking processes of falling droplet, while the charging and discharging process between charge storage and extraction capacitors can generate displacement current output for external circuit. Meanwhile, it is found that a special charged droplets adhesion phenomenon happens at the liquid–solid interface, which seriously hinders the continuous output of ECP‐LSTENG. To overcome this limitation, a special coaxial deceleration commutation component is designed to ensure continuous output of the ECP‐LSTENG. Finally, the peak power density of a droplet (50 µL) reaches 231.8 W m−2, surpassing the highest research record to date by 1.43 times. This ECP‐LSTENG provides a different approach for the future development of large‐scale integrated raindrop generators for efficient raindrop energy harvesting.
Funder
National Natural Science Foundation of China
Beijing Nova Program
Youth Innovation Promotion Association of the Chinese Academy of Sciences
Fundamental Research Funds for the Central Universities
Science and Technology Commission of Shanghai Municipality
Subject
General Materials Science,Renewable Energy, Sustainability and the Environment