Ultra-Robust And Broadband Rotary Hybridized Nanogenerator For Self-Sustained Smart-Farming Applications

This paper reports a contactless mode triggering-based ultra-robust rotary hybridized nanogenerator (CMTUr-HNG) for harvesting energy from wind and water flows. By implementing a soft magnetic-coupled triggering strategy, the hybrid nanogenerator shows high output performance over a broad range of rotational motions (50–1000 rpm) with excellent robustness. The device is designed for self-sustained smart-farming applications.

• Development of an ultra-robust rotary hybridized nanogenerator (CMTUr-HNG).
• Contactless, soft magnetic-coupled triggering strategy for high performance and durability.
• High output power over a broad range of rotational speeds.
• Successful implementation of a self-powered wireless smart-farm monitoring system.

The CMTUr-HNG was designed with a soft magnetic-coupled triggering mechanism. Triboelectric performance was improved with electrospun nanofibers, and the electromagnetic structure was optimized using finite element simulations. The device's robustness was confirmed through a durability test of over 2 million cycles.

The CMTUr-HNG delivers a maximum hybrid power of 40.65 mW. The triboelectric and electromagnetic generators show high power densities of 1568 mW/kg and 386 mW/kg, respectively, at 500 rpm. A self-powered wireless smart-farm monitoring system was successfully implemented, demonstrating the device's potential for autonomous sensing.