Open AccessEfficient Charging of Li‐Ion Batteries with Pulsed Output Current of Triboelectric Nanogenerators
Author(s) -
Pu Xiong,
Liu Mengmeng,
Li Linxuan,
Zhang Chi,
Pang Yaokun,
Jiang Chunyan,
Shao Lihua,
Hu Weiguo,
Wang Zhong Lin
Publication year - 2016
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.201500255
Subject(s) - triboelectric effect , energy storage , nanogenerator , electrical engineering , electronics , materials science , battery (electricity) , pulsed power , transformer , voltage , power (physics) , engineering , physics , quantum mechanics , composite material
The triboelectric nanogenerator (TENG) is a promising mechanical energy harvesting technology, but its pulsed output and the instability of input energy sources make associated energy‐storage devices necessary for real applications. In this work, feasible and efficient charging of Li‐ion batteries by a rotating TENG with pulsed output current is demonstrated. In‐depth discussions are made on how to maximize the power‐storage efficiency by achieving an impedance match between the TENG and a battery with appropriate design of transformers. With a transformer coil ratio of 36.7, ≈72.4% of the power generated by the TENG at 250 rpm can be stored in an LiFePO 4 –Li 4 Ti 5 O 12 battery. Moreover, a 1 h charging of an LiCoO 2 –C battery by the TENG at 600 rpm delivers a discharge capacity of 130 mAh, capable of powering many smart electronics. Considering the readily scale‐up capability of the TENG, promising applications in personal electronics can be anticipated in the near future.