期刊
CERAMICS INTERNATIONAL
卷 47, 期 24, 页码 35096-35104出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.09.052
关键词
Mechanical energy harvesting; Piezoelectric ceramic powder; Silver nanowires; Piezoelectric nanogenerator
资金
- National Natural Science Foundation of China [U1806221, 51672198]
- Innovation and Development Project of Zibo City [2017CX01A022]
- Instruction & Development Project for National Funding Innovation Demonstration Zone of Shandong Province [2018ZCQZB01, 2019ZCQZB03]
- Key Research & Design Program of Shandong Province [2019GGX102011]
A flexible piezoelectric nanogenerator with optimized electrical properties was fabricated, capable of harvesting mechanical energy from various human motions and demonstrating good mechanical stability. This presents a promising option for harvesting mechanical energy in the surrounding environment.
Organic-inorganic piezoelectric nanogenerators (PNGs) have attracted extensive attention for transforming mechanical energy into electricity in the field of self-powered wearables. Generally, the output electrical performance of PNGs can be enhanced by choosing various materials. Herein, the flexible PNG is fabricated by embedding the Sm-doped Pb(Mg1/3Nb2/3)O-3-PbTiO3 (Sm-PMN-PT) polycrystalline piezoelectric ceramics into polyvinylidene fluoride-trifluoroethylene (P(VDF-TrFE)) composite film. The ceramics with high piezoelectric voltage coefficient g(33) of Sm-PMN-PT are selected as piezoelectric fillers, and the silver nanowires (Ag NWs) with high aspect ratio are embedded as conductive fillers. The optimized electrical properties are achieved for the Ag NWs/15 wt%Sm-PMN-PT/P(VDF-TrFE) PNG, with the open-circuit voltage of up to 83.5 V and instantaneous power density of 7.48 mu W/cm(2). In particular, the good mechanical stability up to 6000 bending-releasing cycles are obtained after aging for two months. The finite element analysis is utilized to calculate the electric potential of piezoelectric composite materials. Moreover, the Ag NWs/15 wt%Sm-PMN-PT/P(VDF-TrFE) PNG could harvest mechanical energy from different types of human motion, such as taping, bending and pressing. All these results indicated that the Ag NWs/15 wt%Sm-PMN-PT/P(VDF-TrFE) PNG can serve as a promising candidate for the harvest mechanical energy in the surrounding environment.
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