Design and experimental analysis of a low-frequency resonant hybridized nanogenerator with a wide bandwidth and high output power density
Scavenging mechanical energy from low-frequency vibrations is of great interest owing to the accessibility of these vibrations in the ambient environment. In this study, the design and experimental analysis of a low-frequency resonant hybridized nanogenerator (LFR-HN) with a wide bandwidth and high output power density is presented. The design includes the integration of an electromagnetic generator (EMG) and triboelectric nanogenerator (TENG); tests were conducted under excitation by a dynamic shaker and manual vibrations. The EMG part employs the Halbach magnet array (HMA) to improve its magnetic flux which decreases the total dimensions of the generator and increases the high power density in the low-frequency vibration process. The TENG part utilizes nanostructured polytetrafluoroethylene (PTFE) and Al structures nanopores structures to increase the output performance. The fabricated LFR-HN exhibited a resonant frequency and wide bandwidth of 31.8 Hz (EMG) and 19.4 Hz (TENG). In the vibration shaker test, the LFR-HN delivered a maximum average power of 2.61 mW at a load resistance of 850 Ω, corresponding to an average power density of 0.261 mW/cm3 at the resonance frequency of 18 Hz and under an acceleration of 0.85 g. In addition, manual vibration analysis of the LFR-HN was conducted under conditions including a hand banging the table, leg stomping the floor, regular walking, and a hand directly banging the LFR-HN; the average measured output power densities were 0.112 mW/cm3, 0.071 mW/cm3, 0.036 mW/cm3, and 0.158 mW/cm3, respectively. The fabricated LFR-HN demonstrates a significantly higher power density than that reported in previous studies. This study reports an essential step toward using low-frequency vibrations to power vibration sensors and portable and wearable electronic devices; LFR-HN is expected to be broadly applicable in our society.
Similar Publications:
The industrial revolution in automobiles has offered large-scale integration of sensors and interconnections to facilitate smoot...
<p style="text-align: justify;">Since triboelectric nanogenerators (TENG) are receiving attention as a promising technology in the domain of self-power...
The rapid growth of portable and wearable electronics demands innovative battery solutions that are both sustainable and eco-friendly. Bi...
Industrial vibration monitoring is crucial for anticipating equipment failures and ensuring smooth machinery operation...
Significant research has been conducted to find practical methods to increase the triboelectric charge density of
Self-powered sensors based on triboelectric nanogenerators (TENGs) have shown great advantages in human-machine interactions. However, the complex preparatio...
Self-powered motion sensors are demanded as an energy-efficient technology for future autonomous applications. However, realizing fully self-powered random m...
The combination of energy harvester and energy storage in a single unit without an external complex circuit has sparked significant interest, owing to the po...
High-performance triboelectric nanogenerators (TENGs) have become more attractive for energy harvesting and self-powered sensing applications. Herein, a stre...
The investigation of efficient research approaches to boost the output performance of triboelectric nanogenerators (TENGs) is crucial in extending ...