Triboelectric Nanogenerator Based on Fully Enclosed Rolling Spherical Structure for Harvesting Low-Frequency Water Wave Energy

被引:335
作者
Wang, Xiaofeng [1 ,2 ]
Niu, Simiao [1 ]
Yin, Yajiang [2 ]
Yi, Fang [1 ]
You, Zheng [2 ]
Wang, Zhong Lin [1 ,3 ]
机构
[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
[2] Tsinghua Univ, Dept Precis Instrument, Beijing 100084, Peoples R China
[3] Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing 100083, Peoples R China
基金
中国国家自然科学基金;
关键词
mechanical energy harvesting; rolling structure; triboelectric nanogenerators; wave energy; ELECTROMAGNETIC GENERATOR; VIBRATION; POWER;
D O I
10.1002/aenm.201501467
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Water waves are increasingly regarded as a promising source for large-scale energy applications. Triboelectric nanogenerators (TENGs) have been recognized as one of the most promising approaches for harvesting wave energy. This work examines a freestanding, fully enclosed TENG that encloses a rolling ball inside a rocking spherical shell. Through the optimization of materials and structural parameters, a spherical TENG of 6 cm in diameter actuated by water waves can provide a peak current of 1 A over a wide load range from a short-circuit condition to 10 G, with an instantaneous output power of up to 10 mW. A multielectrode arrangement is also studied to improve the output of the TENG under random wave motions from all directions. Moreover, at a frequency of 1.43 Hz, the wave-driven TENG can directly drive tens of LEDs and charge a series of supercapacitors to rated voltage within several hours. The stored energy can power an electronic thermometer for 20 min. This rolling-structured TENG is extremely lightweight, has a simple structure, and is capable of rocking on or in water to harvest wave energy; it provides an innovative and effective approach toward large-scale blue energy harvesting of oceans and lakes.
引用
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页数:9
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