Stackable Direct Current Triboelectric‐Electromagnetic Hybrid Nanogenerator for Self‐Powered Air Purification and Quality Monitoring

Abstract

Triboelectric nanogenerators (TENGs) and electromagnetic generators (EMGs) show their strengths in harvesting mechanical energy from ambient environment, while the output characteristics of the hybrid generators are not optimally utilized. Here, a stackable triboelectric‐electromagnetic hybrid nanogenerator is designed to construct a self‐powered environmental governance system that fully harnesses the high‐voltage output of TENG and high‐current output of EMG, respectively. Based on the corona discharge, a cylindrical direct‐current TENG is obtained by a flexible contact between flourinated ethylene propylene and Ag fiber cloth. Systematic studies of the parameters that affect TENG outputs are also performed. The results show that the two stacked direct‐current TENG generates a −8.76 µC s−1 discharge rate and −21.61 kV voltage at 1400 rpm. For the EMG component, the rectified average power is 2.51 W, which can charge a capacitor of 1 F to 3 V in 38.9 s. Finally, driven by airflow, the designed hybrid nanogenerator is applied to release negative air ions and continuously power an air quality detector. The self‐powered air purification and quality monitoring system via hybrid nanogenerator established in this work may provide an alternative avenue for sustainable societies.

Recent Advances in Self-powered Sensors Based on Nanogenerators: From Material and Structural Design to Cutting-Edge Sensing Applications

“…As Figure 18E shows, Chen et al developed a statable hybrid NG that utilized the flexible contact between ethylene-propylene fluoride and silver fiber cloth generated through corona discharge to realize cylindrical direct-current TENG (DTENG) for a self-powered environmental governance system. 308 The results showed a discharge rate of −7.166 μC s −1 and a voltage of −21.61 kV at 1300 rpm for the two stacked DTENGs. In addition, the EMG component could achieve a rectified average power of 2.51 W. Finally, the airflow enabled the hybrid NG to release negative ions for powering the air quality detector.…”

“…This study demonstrated a new design and method to improve the output performance of TENGs, providing a good prospect for constructing a self-powered water sensing system driven by low-frequency water waves. As Figure E shows, Chen et al developed a statable hybrid NG that utilized the flexible contact between ethylene-propylene fluoride and silver fiber cloth generated through corona discharge to realize cylindrical direct-current TENG (DTENG) for a self-powered environmental governance system . The results showed a discharge rate of −7.166 μC s –1 and a voltage of −21.61 kV at 1300 rpm for the two stacked DTENGs.…”

Polynary energy harvesting and multi-parameter sensing in the heatwave environment of industrial factory buildings by an integrated triboelectric–thermoelectric hybrid generator

“…On the other hand, a triboelectric nanogenerator (TENG) is a compelling energy harvesting technology, 11,12 which exhibits crucial potential for mechanical energy harvesting and active sensing based on the coupling of contact electrification and electrostatic induction. 13,14 Due to diverse electricity generation mechanisms and energy input characteristics, a TENG can be integrated with many other technologies, such as an electromagnetic generator (EMG), 15 a piezoelectric nanogenerator (PENG), 16 a solar cell (SC), 17 and a thermoelectric generator (ThEG), 18,19 to develop a multi-functional hybrid generator. There have been many efforts devoted to combining a TENG with a ThEG for achieving efficient harvesting of multiple energies.…”

Bionic Blade Lift‐Drag Combination Triboelectric‐Electromagnetic Hybrid Generator with Enhanced Aerodynamic Performance for Wind Energy Harvesting

“…[23] The TENG for harvesting wind energy mainly includes windinduced vibration mode [24][25] and rotation mode. [26][27][28][29] For the rotating TENGs, the output performance is proportional to the driving torque of the energy harvesting devices. [30] Presently, the rotating TENGs mainly adopt wind cups [31][32][33][34] or windmills [35] to harvest wind energy.…”