A highly dense structure boosts energy harvesting and cycling reliabilities of a high-performance lead-free energy harvester

作者：Zheng, Mupeng; Hou, Yudong^*; Yan, Xiaodong; Zhang, Lina; Zhu, Mankang

来源：Journal of Materials Chemistry C, 2017, 5(31): 7862-7870.

DOI：10.1039/c7tc00914c

• FREE PIEZOELECTRIC CERAMICS
• ELECTRICAL-PROPERTIES
• FREE PIEZOCERAMICS
• NANOGENERATOR
• TEMPERATURE
• POWER
• MICROSTRUCTURE
• DEVICES
• ZNO

Currently, effective piezoelectric energy harvesters are based on Pb(Zr, Ti)O-3 (PZT) ceramics. However, the growing environmental concerns have been pushing the development of viable green alternatives for lead-based piezoelectric ceramics. In this study, a high quality Mn-modified (K0.5Na0.5) NbO3 (Mn-KNN) lead-free piezoelectric ceramic has been prepared, which is promising for use in lead-free piezoelectric energy harvesters. Herein, we showed that the 1.0 mol% Mn-KNN ceramics not only possessed high Curie temperature, but also exhibited excellent energy harvesting performance due to the highly dense fine-grained structure and various domain configurations. In the mode of a cantilever-type energy harvester, a high output power of 85 mu W and peak-to-peak voltage of 16 V were obtained at the acceleration of 40 m s(-2). Furthermore, the 1.0 mol% Mn-KNN energy harvester exhibits excellent fatigue resistance up to 10(6) cycles. These findings indicate potential applications of the Mn-KNN piezoelectric energy harvester for self-powered sources of wireless sensor network systems.

• 出版日期2017-8-21
• 单位北京工业大学