Research Progress on Piezoelectric Energy Harvesting Devices

Dear Colleagues,

With the rapid development of the Internet of Things (IoT) and wireless sensor networks (WSNs), piezoelectric energy harvesting technology has emerged as a sustainable solution to replace conventional power supplies by scavenging ambient energy. These technologies are now integrated into diverse applications, from consumer electronics to smart infrastructure and biomedical implants, demonstrating their transformative potential in future smart societies.

The key challenges lie in achieving highly efficient energy conversion and adapting to low-frequency environments. Beyond material optimization, advanced strategies such as multi-physics coupling mechanisms and impedance matching are being explored. Concurrently, smart structures like MEMS arrays and 3D-printed hybrid systems challenge performance boundaries.

This Special Issue highlights innovations in piezoelectric energy harvesters with an emphasis on self-powering, self-tuning, and intelligent adaptation. Topics include, but are not limited to, the following: (1) novel high-power-density piezoelectric materials; (2) reconfigurable broadband structures; (3) self-adaptive interface circuits; (4) multi-scale modeling; and (5) applications in self-powered systems.

Dr. Min Wang
Dr. Junrui Liang
Guest Editors

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