Low-Frequency Vibration Energy Harvesting With Bidomain LiNbO3 Single Crystals


Low-frequency vibration energy harvesting is becoming increasingly important for environmentally friendly and biomedical applications in order to power various wearable and implanted devices. In this paper, we propose the use of piezoelectric congruent LiNbO3 (LN) single crystals, with an engineered bidomain structure, as an alternative to the widely employed lead-based PZT. We thus compared experimentally the pure vibration energy scavenging performance of square-shaped bidomain and single-domain Y+128 degrees-cut LN crystals and a conventional bimorph soft PZT ceramic bonded to long spring-steel cantilevers as a function of the frequency, load resistance, and tip proof mass. At a low bending resonance frequency of ca. 32.2 Hz, the bidomain LN yielded an open-circuit voltage of 1.54 kV/g, almost one order of magnitude larger than that observed in PZT. The maximum extractable average power was found to be of 9.2 mW/g(2) in the bidomain LN, 6.2 mW/g(2) in the single-domain LN, and 1.8 mW/g(2) in the PZT piezo-elastic cantilevers. With five times higher output power density of up to 11.0 mW/(cm(3).g(2)) under resonance conditions, bidomain LN was thus shown to be a reliable lead-free and high-temperature alternative to PZT, thanks to its considerably larger quality factor and electromechanical conversion efficiency.




Acoustics; Engineering


Vidal, JV; Turutin, AV; Kubasov, IV; Kislyuk, AM; Malinkovich, MD; Parkhomenko, YN; Kobeleva, SP; Pakhomov, OV; Sobolev, NA; Kholkin, AL

nossos autores


This work was supported in part by the Russian Science Foundation for the selection of optimal crystallographic cut of LiNbO3 crystals and preparation of bidomain LN samples under Project 18-79-10265, in part by the Project I3N/FSCOSD under Grant FCT UID/CTM/50025/2013. Part of the work was developed within the scope of the project CICECO-Aveiro Institute of Materials, FCT Ref. UID/CTM/50011/2019, financed by national funds through the FCT/MCTES. We acknowledge also the project Smart Green Homes - BOSCH (POCI-010247-FEDER-007678) for the post-doctoral scholarship (BOSCH grant BPD/CICECO/5339/2018). The work of N. A. Sobolev was supported by the Ministry of Education and Science of the Russian Federation through the framework of the Increase Competitiveness Program of NUST MISiS under Grant K3-2018-025, implemented by a governmental decree dated March 16, 2013, N 211. The work of O. V. Pakhomov was supported by the Ministry of Education and Science of the Russian Federation under Project 17599.2017/6.7. The work of J. V. Vidal and A. L. Kholkin was supported in part by FCT through the project SelfMED under Grant POCI-01-0145-FEDER-031132.

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