Enhanced Inverse Piezoelectricity in Flexible PVDF Composites via Mesoporous Silica-Coated BST Core-Shell Submicron fillers

Key Points

• To investigate the enhancement of inverse piezoelectricity in PVDF composites using mesoporous silica-coated BST fillers.
• Utilized core-shell submicron fillers to modify PVDF composites.
• Analyzed the electroactive β phase content and interfacial compatibility in varying compositions.
• Conducted tests for piezoelectric output under mechanical deformation.
• Increased β phase proportion by 25%, leading to a significant rise in piezoelectric output.
• Demonstrated 40% improvement in mechanical stability when using coated fillers compared to uncoated samples.
• Achieved effective stress-strain response with a gain of 0.75 in piezoelectric efficiency.