This work proposes a graded metamaterial-based energy harvester integrating the piezoelectric harvesting function targeting low-frequency ambient vibrations (<100 Hz). The combines metamaterial with beam-like resonators, patches, and self-powered interface circuit for broadband high-capability harvesting. Firstly, an integrated lumped parameter model is derived from both mechanical electrical s...

There are a lot of vibrational energies, which low frequency, multidirectional, and broadband, in the nature. This creates difficulties for devices that aim at harvesting vibration energy. Here, we present liquid-metal-based freestanding triboelectric generator (LM-FTG) energy harvesting. In this device, fluidity liquid is used to increase sensitivity better low-frequency response multidirectio...

Wireless energy harvesting enables the conversion of ambient into electrical power for small wireless electronic devices. This technology offers numerous advantages, including availability, ease implementation, functionality, and cost-effectiveness. Radio frequency (RFEH) is a specific type that transfer by utilizing RF signals. RFEH holds immense potential extending lifespan sensors wearable e...