A dragonfly-wing-like energy harvester with enhanced magneto-mechano-electric coupling

作者：Jianglei Chang, Xiangyu Gao, Wei Peng, Zhonghui Yu, Zhaoqiang Chu, Junqi Gao, Ming Liu, Penghong Ci, Shuxiang Dong · 发表于：Device · 年份：2023 · DOI：10.1016/j.device.2023.100021 · 被引用次数：41 · 研究领域：Innovative Energy Harvesting Technologies、Advanced Sensor and Energy Harvesting Materials、Energy Harvesting in Wireless Networks

Energy harvesting is crucial for sustainable micropower sources, but conventional energy harvesters have limited power-generation capabilities. To address this, we introduce a novel dragonfly-wing-like energy harvester with four wing-like magnetoelectric laminated cantilever beams operating in two intercrossed antisymmetric bending modes. This design enhances magneto-mechano-electric coupling, enabling efficient harvesting of stray magnetic field and weak vibrations. Under a weak alternating current (AC) magnetic field (HAC = 3 Oe, f = 50 Hz), our portable dragonfly-wing-like energy harvester (DWL-EH) achieves a record-high output power of 25.89 mWavg and also effectively harvests low-level vibration energy with the highest output power density by far. Remarkably, even under an HAC of 1 Oe, the DWL-EH generates sufficient power to illuminate hundreds of light-emitting diodes (LEDs). Furthermore, the harvested energy powers a multi-sensor Internet of Things system for real-time environmental monitoring. This work highlights the effectiveness of incorporating natural inspirations into piezoelectric and magnetoelectric energy harvesters through bionic movement pattern emulation.