Enhanced Polarization of Piezoelectric Nanofibrous Mats via Constant-Current Corona Charging

This work examines the effects of constant-current corona poling on electrospun P(VDF-TrFE) nanofibrous mats. By maintaining a fixed current during polarization, a peak piezoelectric coefficient (d33) of 21.5 ± 0.3 pC/N was achieved at 50 μ A. FTIR, DSC, and WAXD analyses confirmed enhanced β-phase content, crystallinity, and ferroelectric ordering. Compared to traditional methods, this approach improves piezoelectric uniformity and performance, while reducing α-phase. The method demonstrates strong potential for scalable polarization of large-area samples, outperforming both DC and conventional corona triode poling techniques.