MOF-derived porous Ni/C material for high-performance hybrid nanogenerator and self-powered wearable sensor

Abstract

This study proposed a self-powered bio-sensing positioning system driven by MOF-derived porous Ni/C material-based hybrid nanogenerator. The porous structure of Ni/C nanoparticles provides a high specific surface area, increases the capacitance of the nano-composite, and traps more charges due to the formation of micro-capacitors, which boost the performance of TENGs. The as-fabricated enhanced TENG achieved a peak voltage of 820 V and a power density of 10.1 W/m2. An optimal bilayer structure was determined through experiments and simulations to obtain the maximum output performance. Flexible TENGs are placed on various parts of the body to achieve biomechanical energy harvesting and motion monitoring, and provide power sources for small electronics. By combining with electromagnetic generator (EMG), a wearable self-powered positioning system is constructed. This work provides a new idea to enhance the output of TENG, and broadens the application of TENG in self-powered wearable systems.