Magnetic field and ultrasound induced simultaneous wireless energy harvesting
Magnetic field and ultrasound induced simultaneous wireless energy harvesting
复制标题
磁场和超声波感应同时无线能量收集
DOI：
10.1039/d3ee03889k
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发表时间：
2024
影响因子：
32.5
通讯作者：
Kiani, Mehdi
中科院分区：
文献类型：
--
作者：
Karan, Sumanta Kumar;Hosur, Sujay;Kashani, Zeinab;Leng, Haoyang;Vijay, Anitha;Sriramdas, Rammohan;Wang, Kai;Poudel, Bed;Patterson, Andrew D.;Kiani, Mehdi
能量收集可以提供运行生物医学、物理和化学设备所需的持续电力。然而，由于考虑到低于人体安全限制的源能量，其功率密度有限，因此通过能量收集仅利用单一模式为许多设备提供足够的电力仍然具有挑战性。在这里，首次展示了使用压电和磁电转换的高功率密度能量收集器在人体安全极限内运行。这种双收集器可以从不同方向收集能量，这使得它对源方向不敏感。原型设计被证明可以从穿过液体/组织介质的单个设备同时采集磁能和超声能，在输入~500 μT rms 磁场和~675 mW cm−2 超声强度时产生~52.1 mW 的超高功率（功率密度~597 mW cm−3），低于 IEEE 和 FDA 规定的安全限值。与在安全限制下使用单一电源的单个磁电系统相比，这意味着性能提高了约 225%。该设备可以在猪组织中以~1.67 mC s−1 的速率对容量为 1 mA-h 的 3 V 锂离子电池进行充电。这些发现表明，基于磁场和超声波强度的双能量采集器具有为各种电子设备供电的潜力，例如植入式设备和嵌入式组件。
Energy harvesting can provide continuous power required for operating biomedical, physical, and chemical devices. However, providing sufficient power for many devices utilizing only a single modality through energy harvesting is still challenging due to its restricted power density considering the source energy that is below human body safety limits. Here, for the first time a high-power density energy harvester using piezoelectric and magnetoelectric conversion is demonstrated operating within the human body safety limit. This dual harvester can harvest energy from different directions, which makes it insensitive to the source orientation. Prototype design is demonstrated to harvest magnetic and ultrasound energies simultaneously from a single device traveling through liquid/tissue media generating an ultra-high power of ∼52.1 mW (a power density of ∼597 mW cm−3) across input of ∼500 μT rms magnetic field and ∼675 mW cm−2 ultrasound intensity, which are below the safety limits prescribed by the IEEE and FDA. This represents an ∼225% improvement compared to individual magnetoelectric systems utilizing a single source under safety limits. The device can recharge a 3 V lithium-ion battery with 1 mA-h capacity at a rate of ∼1.67 mC s−1 in porcine tissue. These findings suggest that the dual energy harvester based on magnetic field and ultrasound intensity has the potential to power various electronic devices, such as implantable devices and embedded components.