Performance Enhancement of Flexible Piezoelectric Nanogenerator via Doping and Rational 3D Structure Design For Self‐Powered Mechanosensational System
By Yuanzheng Zhang, Mengjun Wu, Quanyong Zhu, Feiyu Wang, Huanxin Su, Hui Li, C. Diao, Haiwu Zheng, Yonghui Wu, Zhong Lin Wang. Advanced Functional Materials, 2019
165 citations recorded by the source corpus.
With the rapid development of the Internet of things (IoT), flexible piezoelectric nanogenerators (PENG) have attracted extensive attention for harvesting environmental mechanical energy to power electronics and nanosystems. Herein, porous piezoelectric fillers with samarium/titanium‐doped BiFeO3 (BFO) are prepared by a freeze‐drying method, and then silicone rubber is filled into the microvoids of the piezoelectric ceramics, forming a unique structure based on silicone rubber matrix with uniformly distributed piezoelectric ceramic. When subjected to external force stimulation, compared with conventional piezocomposite films found on undoped BFO without a porous structure, the PENG possesses higher stress transfer ability and thus boosts output performance. The notable enhancement in the stress transfer ability and piezoelectric potential is proven by COMSOL simulations. The PENG can exhibit a maximum open‐circuit voltage (Voc) of 16 V and short‐circuit current (Isc) of 2.8 µA, which is 5.3 and 5.6 times higher than those of conventional piezocomposite films, respectively. The PENG can be used as a triggering signal to control the operation of fire extinguishers and household appliances. This work not only expands the application scope of lead‐free piezoelectric ceramic for energy harvesting, but also provides a novel solution for self‐powered mechanosensation and shows great potential application in IoT.
Subfields: Biomedical Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/5ebe76121740fbccac275f5bdf075cb30b26f127
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Citations in the corpus
- Promoting smart cities into the 5G era with multi-field Internet of Things (IoT) applications powered with advanced mechanical energy harvesters (2021, background): “Moreover, PENGs also present the potential of harvesting widely distributed mechanical energy from human motions [160,174], sounds [175], ambient vibrations [176], even organs [177,178].”
- Porous, multi-layered piezoelectric composites based on highly oriented PZT/PVDF electrospinning fibers for high-performance piezoelectric nanogenerators (2021, background): “This structure integrates the advantages of piezoelectric ceramics/semiconductors and polymers, but is not effectively better in the output performance of the composite-based PENGs because of particle aggregation [10] or isolation microstructure [11], as well as insufficient flexibility.”