Enhanced Piezoelectric Energy Harvester by Employing Freestanding Single‐Crystal BaTiO 3 Films in PVDF‐TrFE Based Composites

Abstract Advancements in wearable electronics and Internet of Things (IoT) sensors have catalyzed the need for effective micro‐energy harvesting. Piezoelectric nanogenerators (PENGs) are ideal due to their high conversion efficiency and durability. However, the contrast between the high piezoelectric coefficients of brittle inorganic ceramics and the lower coefficients of superior flexibility and biocompatibility of organic polymers poses a significant challenge. This work introduces a novel multilayer composite PENG, integrating a single‐crystal BaTiO 3 (BTO) film between poly(vinylidene fluoride‐co‐trifluoroethylene) (PVDF‐TrFE) layers. The PVDF‐TrFE/BTO/PVDF‐TrFE PENGs demonstrate substantially improved…

• NN
  National Natural Science Foundation of China

  Awards: U22A2019, 52372123, 91964109
• HE
  Higher Education Discipline Innovation Project
• NK
  National Key Research and Development Program of China

  Award: 2022YFB3205701