Efficient Charging of Li‐Ion Batteries with Pulsed Output Current of Triboelectric Nanogenerators

Advanced Science

Xiong Pu¹  Mengmeng Liu¹  Linxuan Li¹  Chi Zhang¹  Yaokun Pang¹  Chunyan Jiang¹  Lihua Shao¹  Weiguo Hu¹ 

[1] Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Science, Beijing, P.R. China

关键词: impedance match;    Li‐ion battery;    power utilization efficiency;    pulsed current;    triboelectric nanogenerator;   

DOI  :  10.1002/advs.201500255

来源: Wiley

【 摘 要 】

Abstract

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 LiFePO₄–Li₄Ti₅O₁₂ battery. Moreover, a 1 h charging of an LiCoO₂–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.

【 授权许可】

CC BY   
© 2015 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.