TY - JOUR
T1 - Enhanced magneto-mechano-electric conversion with an arc-shaped piezoelectric cantilever for wireless sensor networks
AU - Liu, Xu
AU - Wu, Jingen
AU - Liang, Xianfeng
AU - Sun, Xuan
AU - He, Xin
AU - Xu, Yiwei
AU - Lu, Yang
AU - Ju, Dengfeng
AU - Hu, Zhongqiang
AU - Liu, Ming
N1 - Publisher Copyright:
© 2026 Elsevier B.V.
PY - 2026/9/1
Y1 - 2026/9/1
N2 - Magneto-mechano-electric energy harvester (MME-EH) is one of the prospective candidates for powering autonomous Internet of Things (IoT) sensor networks by converting ambient magnetic noise into electrical energy. However, conventional flat-shaped MME-EHs face challenges in effectively harvesting energy from the axially symmetric magnetic field surrounding long, straight power cables. In this work, we develop an arc-shaped MME-EH fabricated through monolithic bonding of flexible lead-free piezoelectric polyvinylidene fluoride (PVDF) polymer onto arc-shaped Ni cantilevers, with NdFeB magnets attached as proof masses. Theoretical analysis, simulations, and experimental results reveal that the arc-shaped MME-EH exhibits a 74% enhancement in output performance compared to its flat-shaped counterpart. Owing to improved strain distribution and elevated electric potential of the arc-shaped PVDF, the optimized device delivers a stable output voltage of 26.2 V, corresponding to a power density of 57 mW m−2 under a 7 Oe alternating magnetic field excitation at the 50 Hz target resonance. Furthermore, a prototype PVDF-based MME-EH is showcased as a persistent power supply for a wireless sensor network, highlighting its potential for large-scale IoT applications.
AB - Magneto-mechano-electric energy harvester (MME-EH) is one of the prospective candidates for powering autonomous Internet of Things (IoT) sensor networks by converting ambient magnetic noise into electrical energy. However, conventional flat-shaped MME-EHs face challenges in effectively harvesting energy from the axially symmetric magnetic field surrounding long, straight power cables. In this work, we develop an arc-shaped MME-EH fabricated through monolithic bonding of flexible lead-free piezoelectric polyvinylidene fluoride (PVDF) polymer onto arc-shaped Ni cantilevers, with NdFeB magnets attached as proof masses. Theoretical analysis, simulations, and experimental results reveal that the arc-shaped MME-EH exhibits a 74% enhancement in output performance compared to its flat-shaped counterpart. Owing to improved strain distribution and elevated electric potential of the arc-shaped PVDF, the optimized device delivers a stable output voltage of 26.2 V, corresponding to a power density of 57 mW m−2 under a 7 Oe alternating magnetic field excitation at the 50 Hz target resonance. Furthermore, a prototype PVDF-based MME-EH is showcased as a persistent power supply for a wireless sensor network, highlighting its potential for large-scale IoT applications.
KW - Arc-shaped
KW - Energy harvesting
KW - Lead-free
KW - Magneto-mechano-electric
KW - PVDF
UR - https://www.scopus.com/pages/publications/105042896446
U2 - 10.1016/j.cej.2026.178357
DO - 10.1016/j.cej.2026.178357
M3 - 文章
AN - SCOPUS:105042896446
SN - 1385-8947
VL - 543
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 178357
ER -