Boosting Piezoelectricity by 3D Printing PVDF‐MoS₂ Composite as a Conformal and High‐Sensitivity Piezoelectric Sensor

Additively manufactured flexible and high-performance piezoelectric devices are highly desirable for sensing energy harvesting of 3D conformal structures. Herein, the study reports a significantly enhanced piezoelectricity in polyvinylidene fluoride (PVDF) achieved through situ dipole alignment PVDF within PVDF-2D molybdenum disulfide (2D MoS2) composite by printing. The shear stress-induced poling 2D MoS2 harnessed during printing to boost without requiring post-poling process. results show remarkable, more than eight-fold increment coefficient (d33) printed PVDF-8wt.% over cast neat PVDF. underlying mechanism property enhancement is attributed increased volume fraction β phase PVDF, filler fraction, heterogeneous strain distribution around PVDF-MoS2 interfaces, transfer nanofillers as confirmed microstructural analysis finite element simulation. These provide promising route design fabricate via next-generation sensors mechanical–electronic devices.