Pukar Maharjan, Trilochan Bhatta, Hyunok Cho, Xue Hui, Chani Park, Sanghyuk Yoon, Md Salauddin, MT Rahman, SM Sohel Rana, and Jae Y Park
Realization of self‐charging, miniaturized, portable, high output, and sustainable energy harvesting devices with wide application areas and good storage under a realistic environment remains a challenge. Herein, a universal self‐chargeable power module (USPM) is presented that can efficiently harvest human bio‐mechanical energy, ocean wave blue energy, and automobile vibration energy. By implementing a multiple spring‐based mechanical coupling design, the hybrid electromagnetic‐triboelectric generator shows high performance despite miniaturization under very low acceleration (≤1 g) and low frequency (≤6 Hz) vibration. The electromagnetic performance is further optimized by using a soft magnetic material‐based flux concentrator while electrospun nanofibers enhance the triboelectric performance. The USPM is a compactly designed device including a power management circuit, a battery charging circuit, built‐in rechargeable storage, and a USB‐C outlet, providing a direct current power of maximum 34.11 mW. Experimental results show remarkable performance in the context of harvesting biomechanical energy from walking, running, cycling and demonstrates real‐time charging of smartphones, earbuds, and smart bands. Similarly, it demonstrates the capability of harvesting blue energy and powering a wireless water health monitoring system using a polyaniline/laser‐induced graphene/polydimethylsiloxane based pH sensor. Moreover, it successfully scavenges automobile vibration energy and demonstrates a self‐powered wireless in‐car environment monitoring system.
The human body continuously emits physiological and psychological information from head to toe. Wearable electronics capable of noninvasively and accurately digitizing this information without compromising user comfort or mobility have the potential to revo...
Maintaining clean and fresh pool water requires regular monitoring and treatment. However, the employed methods are manual, complex, and time-consuming. Herein, we proposed a self-sustainable autonomous smart pool monitoring system that can continuously mon...
In industry 4.0, continuous condition monitoring is essential to keep the system well maintained and stable. However, current monitoring systems demand periodic replacement/recharging of batteries. Herein, a compact vibration-driven intelligent power module...
The prevailing energy harvester utilizes a convectional magnet that limits the output power due to the imperfect coupling of the flux linkage and the leakage of the magnetic fluxes away from the coil. Herein, a circular Halbach array magnet comprising the a...
The contactless triboelectric nanogenerator with the capability of touchless interactions has become extremely fascinating for applications in health care, remote security, and augmented reality. Herein, a Siloxene/Ecoflex nanocomposite-based high-performan...