High-Current Triboelectric Nanogenerator Based on TiO2-Decorated PVDF Membrane via Atomic Layer Deposition for
Duy Linh Vu1, Pham Thi Lanh2, Thi Thuong Nguyen3
1Faculty of Electrical and Electronic Engineering, Phenikaa School of Engineering, Phenikaa University, Hanoi, Vietnam.
Abstract:
Developing direct-current triboelectric nanogenerators (DC-TENGs) with high output performance and reliable operation in humid environments remains a significant challenge. In this study, we introduce a high-performance DC-TENG fabricated by integrating electrospinning, vapor-phase infiltration (VPI), and atomic layer deposition (ALD) to construct a TiO2-modified polyvinylidene fluoride (PVDF) porous fiber (PTPF) membrane. The resulting PTPF10-TENG demonstrates superior electrical performance, generating a peak current of 0.72 mA, an output voltage of 1.79 V, and a maximum power density of 27.3 µW/cm2, representing a 5.4-fold improvement over the porous PVDF membrane. Owing to its strong humidity-responsive behavior, the PTPF10-TENG also functions as a self-powered humidity sensor with a linear sensitivity of 0.0134 mA/%RH (R2 = 0.981) in the 40-100% RH range. These findings underscore the versatility of the PTPF membrane as a multifunctional platform that bridges efficient energy conversion and environmental sensing. This strategy offers a promising route toward scalable fabrication of DC-TENGs tailored for next-generation wearable electronics and intelligent monitoring systems.
