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<p>With the rapid advancement of the Internet of Things (IoT), achieving energy autonomy through the utilization of environmental energy has become a critical challenge. Energy harvesting technology offers a promising solution for converting ambient energy into electrical power for reuse. This paper presents a design strategy to optimize the thickness ratio of layered magnetoelectric composite films, utilizing a metglass/PZT/metglass interlayer structure to enhance interfacial strain transfer efficiency. The stress and strain of the composite material were simulated and analyzed using finite element analysis, leading to the determination of the optimal thickness ratio. Experimental results demonstrate that, under this optimal ratio, the magnetoelectric voltage coefficient (α<sub>ME</sub>) of the composite film reaches 284.97 V·cm⁻<sup>1</sup>·Oe⁻<sup>1</sup>. Under a weak magnetic field of 0.05 Oe, the film exhibits exceptional energy harvesting performance. The open-circuit voltage (V<sub>OC</sub>) under optimal load is 666.14 mV, with a power density of 137.5 μW·cm⁻<sup>3</sup>, showcasing considerable potential for energy harvesting applications. Furthermore, the independently developed magnetoelectric energy harvesting circuit, which integrates a rectifier and energy storage module, successfully powers commercial LEDs and rechargeable lithium-ion batteries. Under typical stray magnetic fields generated by everyday electricity consumption, the energy harvester efficiently converts the surrounding environmental magnetic field into electrical energy to charge the storage device, demonstrating outstanding fatigue resistance. This work offers a high-performance, cost-effective solution for self-powered IoT devices, with broad application potential in smart homes, industrial monitoring, and biomedicine.</p>

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High-efficiency weak-field magnetoelectric energy harvesting utilizing thickness-optimized Metglas/PZT/Metglas composites

  • 期刊论文

  • 发表日期：

    2025年8月12日

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  • Yuncheng Li,
  • Maolin Wen,
  • Jiabo Lu,
  • Xiao Zhang,
  • Zhiyong Li,
  • Xia Wang,
  • Derang Cao,
  • Jie Xu

摘要

With the rapid advancement of the Internet of Things (IoT), achieving energy autonomy through the utilization of environmental energy has become a critical challenge. Energy harvesting technology offers a promising solution for converting ambient energy into electrical power for reuse. This paper presents a design strategy to optimize the thickness ratio of layered magnetoelectric composite films, utilizing a metglass/PZT/metglass interlayer structure to enhance interfacial strain transfer efficiency. The stress and strain of the composite material were simulated and analyzed using finite element analysis, leading to the determination of the optimal thickness ratio. Experimental results demonstrate that, under this optimal ratio, the magnetoelectric voltage coefficient (αME) of the composite film reaches 284.97 V·cm⁻1·Oe⁻1. Under a weak magnetic field of 0.05 Oe, the film exhibits exceptional energy harvesting performance. The open-circuit voltage (VOC) under optimal load is 666.14 mV, with a power density of 137.5 μW·cm⁻3, showcasing considerable potential for energy harvesting applications. Furthermore, the independently developed magnetoelectric energy harvesting circuit, which integrates a rectifier and energy storage module, successfully powers commercial LEDs and rechargeable lithium-ion batteries. Under typical stray magnetic fields generated by everyday electricity consumption, the energy harvester efficiently converts the surrounding environmental magnetic field into electrical energy to charge the storage device, demonstrating outstanding fatigue resistance. This work offers a high-performance, cost-effective solution for self-powered IoT devices, with broad application potential in smart homes, industrial monitoring, and biomedicine.