FeNbO4 nanoparticles-PDMS based triboelectric nanogenerator as self-powered sensor for human motion and artefact position tracking applications

Self-powered sensors are promising eco-friendly option replacing battery-based devices, addressing the need for efficient and environmentally conscious technology. In this context, we report, FeNbO4 nanoparticles interspersed PDMS matrix nanocomposite (FPN) as a vertical-contact separation mode-based high-performance novel triboelectric nanogenerator (TENG), where FPN is tribo-negative layer and Al is tribo-positive layer. The FeNbO4 nanoparticles is synthesized by simple solid state synthesis method and interspersed in PDMS matrix through solution casting. The as-fabricated TENG with optimum 10 wt% FeNbO4 nanoparticles in the FPN layer attains impressive performance metrics with 200 V open circuit voltage (Voc), 0.84 μA short circuit current (Isc), and 0.4 μW/ cm2 power density at 80 MΩ through manual tapping force. This TENG is used for powering LEDs, digital watch, and calculator. Additionally, it serves as a self-powered sensor for footstep counting in crowded areas and safeguarding valuable items against theft by tracking their positions. Notably, this TENG demonstrates excellent long-term stability with 97 % voltage output retention over 60 days, signifying its potential in sustainable and robust self-powered sensing applications.