Dual Structure Reinforces Interfacial Polarized MXene/PVDF-TrFE Piezoelectric Nanocomposite for Pressure Monitoring

• The underlying mechanism improving piezoelectricity via interfacial polarization is elucidated through combining experimental results, molecular dynamics simulations, and density functional theory calculations. • The piezoelectric performance of the nanocomposite is improved based on the successful construction of dual-structure, achieving a threefold increase in piezoelectric response and an eightfold increase in sensitivity in the low-pressure region. • The piezoelectric sensor and array are capable of identifying human physiological signals and monitoring the distribution of pressure, demonstrating cyclic stability exceeding 20,000 cycles. • This study provides an innovative methodology for reinforcing interfacial polarized piezoelectric materials and offers insight into structural designs for flexible electronics.