Journal
NANO ENERGY
Volume 64, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2019.103933
Keywords
Biomechanical energy harvesting; Flexibility and wearability; Nanogenerator fabric; Piezoelectric electrification; Triboelectrification
Categories
Funding
- National Science Foundation of China [51675493, 51605449, 51705476]
- China Postdoctoral Science Foundation [2017M621111, 2018T110207]
- Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi, 135 pre-research fund [61406190504]
- Shanxi 1331 Project Key Subject Construction [1331KSC]
- Key research and development plan [2018YFF0300605]
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Flexible and wearable technology, a large trend in recent electronic technology revolution, proposes an urgent demand for the similarly flexible and wearable power supply. Hence a fully flexible and stretchable piezoelectric-enhanced triboelectric nanogenerator fabric (P-TNGF) possessing high output performance, good air permeability and excellent reliability is proposed in this work for human-body movement energy exploiting. Three consecutive energy conversion processes consisting of two triboelectrification processes and one piezoelectric electrification process exist at three different stages of a work period of P-TNGF, which contributes to harvest ambient energy maximally. By the optimization design of uninterrupted energy harvesting in overall process, a maximum open-circuit voltage and short-circuit current of P-TNGF can reach 600 V and 17 mu A, respectively, and a maximum output power of 1.11 W/m(2) is obtained experimentally under 20M Omega load. Moreover, the operating capability of P-TNGF in various conditions, such as different stimulation frequency and external contact materials is investigated experimentally, showing excellent reliability and availability. Prepared samples are attached to different human-body parts, such as foot and joints, to demonstrate its wearability and biomechanical energy harvesting capability. Processed by rectification circuit, alternating current generated from P-TNGF are charged into several capacitors with various capacitances, which can be utilized to drive commercial electronic devices. The proposed P-TNGF has great significance for the further development of flexible and wearable technology.
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