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The Scientific World Journal - Volume 2014 2014, Article ID 893496, 11 pages -

Research Article

Collaborative Innovation Center for Micro-Nano Fabrication, Device and System, Tsinghua University, Beijing 100084, China

State Key Laboratory of Precision Measurement Technology and Instrument, Tsinghua University, Beijing 100084, China

Department of Precision Instrument, Tsinghua University, Beijing 100084, China

Received 16 May 2014; Accepted 20 June 2014; Published 9 July 2014

Academic Editor: Linni Jian

Copyright © 2014 Jingjing Zhao and Zheng You. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Currently, wearable electronics are increasingly widely used, leading to an increasing need of portable power supply. As a clean and renewable power source, piezoelectric energy harvester can transfer mechanical energy into electric energy directly, and the energy harvester based on polyvinylidene difluoride PVDF operating in 31-mode is appropriate to harvest energy from human motion. This paper established a series of theoretical models to predict the performance of 31-mode PVDF energy harvester. Among them, the energy storage one can predict the collected energy accurately during the operation of the harvester. Based on theoretical study and experiments investigation, two approaches to improve the energy harvesting performance have been found. Furthermore, experiment results demonstrate the high accuracies of the models, which are better than 95%.

Autor: Jingjing Zhao and Zheng You



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