A Flexible PMN‐PT Ribbon‐Based Piezoelectric‐Pyroelectric Hybrid Generator for Human‐Activity Energy Harvesting and Monitoring

Abstract

The rapid advancements of wearable electronics require continued innovation in sustainable power sources and human interactive sensors. An abundance of energy in various forms, such as mechanical, thermal, optical, and sound are ubiquitous in the environment and human activities. Currently, hybrid generators using piezoelectric polymers with relatively low piezoelectric and pyroelectric constants have been fabricated to simultaneously scavenge mechanical and thermal energies. In this work, micro-patterned single-crystal PMN-PT Received: ((will be filled in by the editorial staff)) Revised: ((will be filled in by the editorial staff)) Published online: ((will be filled in by the editorial staff))

Energy Harvesting Research: The Road from Single Source to Multisource

“…The use of ferroelectric materials for the simultaneous harvesting of kinetic and thermal energies has already been realized. Figure shows an example of a practical application using a micropatterned PMN‐PT single crystal flexible ribbon to harvest kinetic and thermal (temperature fluctuation) energies concurrently . PMN‐PT single crystals were first grown.…”

“…When the harvester was immersed in warm water (temperature increasing) and then removed, pyroelectric output signals were detected, as shown in Figure c. Such a multisource energy harvester could provide a peak output power density of about 25 mW cm −2 . The harvested energy was used to power monitoring sensors.…”

Flexible Multifunctional Sensors for Wearable and Robotic Applications

“…Single-crystal PMN-PT as a highly active piezoelectric material possess a ultrahigh d 33 of 2800 pC N −1 , [71] which is 85 and 226 times higher than that of PVDF and ZnO, respectively; the material also exhibits a high pyroelectric coefficient of 1040 µC m −2 K −1 . [69] Figure 4 demonstrates the fabrication process of this 0.7PMN-0.3PT ribbon-based hybrid sensor on flexible polymer substrate. [69] Figure 4 demonstrates the fabrication process of this 0.7PMN-0.3PT ribbon-based hybrid sensor on flexible polymer substrate.…”

“…[44] A number of attempts have been made to fabricate highly active flexible PMN-PT [69,72] and Chen et al used flexible single crystal 0.7PMN-0.3PT ribbons to both realize motion and temperature monitoring. [69] In addition, the sensor was used for monitoring temperature-related activities, such as warm water flow and light illumination. This flexible PMN-PT sensor attached to the human skin enables high sensitivity for human body motion and can precisely detect acoustic signals.…”

“…Reproduced with permission [69]. PMN-PT ribbon-based sensor for water temperature and light illumination monitoring.…”