Abstract

The development of flexible, durable, and biocompatible multi-functional energy harvesters with exceptional power density is a challenging task for scavenging electricity from readily available energy resources to power e-healthcare monitoring devices and real smart electronics. Using flexible and biocompatible lead-free BZT-BCT single-crystal fibers, herein, we developed a magneto-mechano-electric (MME) generator with promising performance to harvest ambient magnetic energy with high robustness. Our optimized lead-free MME generator can produce an open-circuit voltage of 11 V and a short-circuit current of 62 μA with a low alternating current magnetic field of 1 mT (≡10 Oe; resonant frequency = 60 Hz). After voltage rectification, a maximum DC power density of 504 μW-cm⁻³ was generated by this energy harvester, which was more than two to three orders of magnitude higher than the power density generated by a previously reported lead-free BaTiO₃ nano-generator (0.84 µW-cm⁻³)¹ and was comparable to that of a hazardous lead-based PZT/Ni generator (270 μW-cm⁻³)². The harvested power was large enough to light a light-emitting diode (LED). The proposed lead-free MME generator was demonstrated to scavenge ambient magnetic energy and could be potentially applied in eco-friendly self-powered systems.

Graphic Abstract

中文翻译：

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基于无铅单晶纤维的磁－机电发电机，用于强力清除环境磁能

摘要

灵活，耐用且具有生物相容性的多功能能量采集器的开发具有极高的功率密度，这是一项艰巨的任务，它需要将电能从随时可用的能源中清除，为电子医疗监控设备和真正的智能电子设备供电。本文中，我们使用具有柔性和生物相容性的无铅BZT-BCT单晶纤维，开发了一种磁电机（MME）发电机，该发电机具有可观的性能，能够以高鲁棒性收集环境磁能。我们经过优化的无铅MME发生器可产生11 V的开路电压和62μA的短路电流，并具有1 mT（≡10 Oe；谐振频率= 60 Hz）的低交流磁场。电压整流后，504μW-cm的最大直流功率密度^-3由这种能量采集器产生的，比以前报道的无铅BaTiO ₃纳米发生器（0.84 µW-cm ^-3）¹产生的功率密度高2至3个数量级，并且与一个基于铅PZT危险/镍发生器（270μW-厘米^-3）²。收集到的功率足够大，可以点亮发光二极管（LED）。所提出的无铅MME发电机被证明清除周围磁场能量，可以在环保的自我被潜在的应用价值-动力系统。

图形摘要