Fabrication of Electrospun PAN-CNT-CNC Composite Nanofiber Films for Hydrovoltaic Energy Harvesting

초록

Water-induced electrical responses were investigated using porous electrospun PAN-based composite membranes containing CNTs and CNCs. Following the injection of 20 mu L of a 2 wt% NaCl solution, transient open-circuit voltage responses were observed from the PAN, PAN-CNT, and PAN-CNT-CNC devices, with maximum values of approximately 47, 42, and 68 mV, respectively, in the tested devices. Three successive injection-drying cycles demonstrated repeated transient responses within individual devices but did not establish device-to-device reproducibility or long-term stability. Raman and FTIR analyses supported the incorporation of CNTs and the modification of the water-interacting environment following CNC addition, respectively. The voltage waveform depended on the liquid type, NaCl concentration, and wetting-drying history, including a transient reverse-voltage response during drying. These results provide a proof-of-concept observation of wetting-drying-dependent electrical behavior in electrospun PAN-based porous membranes. Load-dependent power, long-term durability, and device-to-device reproducibility remain to be established.

키워드