V2CTx /PVDF-HFP Composite Nanofibers-Based Self-Powered Pressure Sensor for Human Foot Pressure and Activity Monitoring

Herein, novel self-powered triboelectric pressure sensor (STPS) utilizing V2CT
x
@Polyvinylidene fluoride-co-hexafluoropropylene (V2CT
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@PVDF-HFP) composite nanofiber and Polyethylene oxide (PEO) nanofiber is proposed for real-time human activity monitoring. The method involves incorporating V2CTx nanosheets into P(VDF-HFP) matrix through electrospinning, resulting in a highly negative triboelectric layer with increased surface-charge density and dielectric constant. The abundant functional groups on V
2
CT
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surfaces enhance electronegativity, while micro-capacitor formation within the polymer-matrix enhances the dielectric property resulting into three-fold performance enhancement. The fabricated STPS exhibited exceptional attributes, including high electrical output (7.21 mW) and remarkable mechanical sensitivity (25.59 V/kPa) at low pressure. On the basis of its efficacy, the STPS was successfully demonstrated for real-time monitoring of foot pressure and human activity during walking, running, and jumping.