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Nano Research

Article Title

Ultra-robust triboelectric nanogenerator for harvesting rotary mechanical energy

Authors

Xinyu Du, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing 100083, China
Nianwu Li, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing 100083, China
Yuebo Liu, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China
Jiaona Wang, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China
Zuqing Yuan, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing 100083, China University of Chinese Academy of Sciences, Beijing 100049, China
Yingying Yin, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing 100083, China University of Chinese Academy of Sciences, Beijing 100049, China
Ran Cao, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing 100083, China University of Chinese Academy of Sciences, Beijing 100049, China
Shuyu Zhao, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China
Bin Wang, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China
Zhong Lin Wang, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing 100083, China School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, USA University of Chinese Academy of Sciences, Beijing 100049, China
Congju Li, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST), Beijing 100083, China

Keywords

nanogenerator, ultra-robust, energy harvesting, rotary motions, scale-like structure

Abstract

ABSTRACT Triboelectric nanogenerators (TENGs) for harvesting rotary mechanical energy are mostly based on in-plane sliding or free-standing mode. However, the relative displacement between two contacting triboelectric layers causes abrasion, which lowers the output power and reduces service life. Therefore, it is important to develop a method to minimize abrasion when harvesting rotary mechanical energy. Here, we report a scale-like structured TENG (SL-TENG), in which two triboelectric layers work under a contact-separation mode to avoid in-plane relative sliding in order to minimize abrasion. As a result, the SL-TENG exhibits outstanding robustness. For example, the output voltage of the SL-TENG does not exhibit any measurable decay although this output has been continuously generated through more than a million cycles. Moreover, at a very low rotation rate of 120 rpm, the SL-TENG can generate a maximum short-circuit current of 78 μA, delivering an instantaneous power density of 2.54 W/m2 to an external load. In relation to this, a Li-ion battery was charged using the SL-TENG. After a 30-min charging time, the battery achieved a discharge capacity of 0.1 mAh. Through a power management circuit integrated into the SL-TENG, a continuous direct current (DC) of 5 V is outputted, providing sufficient DC power for driving a radio-frequency wireless sensor and other conventional electronics.

Graphical Abstract

Publisher

Tsinghua University Press

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