Robust PVA-MWCNTs-based triboelectric energy harvesting device: Self-powered smart-door technology

Triboelectric nanogenerators (TENGs) are emerging as promising solutions for mechanical energy harvesting from various environmental sources, offering a pathway toward self-sufficient power generation. The present research demonstrates the feasibility and effectiveness of the polyvinyl alcohol (PVA)-multi-walled carbon nanotubes (MWCNTs) composite as a tribopositive material for designing robust TENG. Through comprehensive evaluations, the dispersion of MWCNTs in PVA is confirmed. MWCNTs-based TENGs are fabricated in a vertical contact-separate configuration for harnessing mechanical energy effectively. The device's performance metrics including output voltage, current, power generation, and durability, are investigated. The device with 1.6 wt% MWCNTs fillers exhibits a performance enhancement in voltage and current. The optimized MWCNTs-based TENG attains its maximum power of 542 μW at 30 MΩ load resistance, showcasing its potential for powering small-scale electronics. Furthermore, possible applications and implications of integrating self-powered smart-door systems are demonstrated. This can be implemented in various real-world scenarios, such as residential buildings, commercial establishments, and public facilities.