Coupling of interface effects and porous microstructures in translucent piezoelectric composites for enhanced energy harvesting and sensing

Solvent-Exchange-Assisted 3D Printing of Self-Polarized High β-PVDF for Advanced Piezoelectric Energy Harvesting

“…It is fully demonstrated that our novel approach can eliminate the severe shrinkage issue of the conventional solvent evaporation method, enabling the fabrication of complex geometric shapes with designated feature. Besides, abundant micropores with size <1 μm (Figures c 2 and S4) were generated instead of densely distributed spherulitic structures (Figure d 2 ) when the solvent evaporation method is applied, which is favorable for the strain magnification, thereby enhancing the electromechanical response through modulus reduction . As shown in Figure S4, varying the VB 2 content up to 2 wt % shows a subtle influence on the micromorphology of PVDF, where the size distribution of the microscopic pores remains almost constant.…”

“…Besides, abundant micropores with size <1 μm (Figures 3c 2 and S4) were generated instead of densely distributed spherulitic structures (Figure 3d 2 ) when the solvent evaporation method is applied, which is favorable for the strain magnification, thereby enhancing the electromechanical response through modulus reduction. 38 As shown in Figure S4, varying the VB 2 content up to 2 wt % shows a subtle influence on the micromorphology of PVDF, where the size distribution of the microscopic pores remains almost constant. Furthermore, as displayed in Figure S5, elemental mapping strongly supports the existence of C, F, O, and N in the 0.8 wt % VB 2 -modified PVDF 3D part, indicating the evenly distribution of VB 2 in a PVDF matrix which provides good foundation for adequately intermolecular interaction between VB 2 and PVDF.…”

High-performance piezoelectric nanogenerators featuring embedded organic nanodroplets for self-powered sensors

“…5i and Table S3 of the ESI † compare the piezoelectric performance of SL-PENGs to that of the previously related works. Clearly, the SL-PENG with droplet llers exhibited better piezoelectric output performance than those with opened cell structures [57][58][59][60][61][62][63][64] or microstructures, 65,66 which prove the superiority of the solid-liquid structure. To further evaluate the feasibility of energy harvesting for the purpose of powering electronic devices, the SL-PENG was employed to charge capacitors through a bridge rectier circuit, as plotted in Fig.…”

Perspective on the development of high performance flexible piezoelectric energy harvesters

“…The most widely investigated FPEH devices and related applications are based on 0-3 type piezoelectric/polymer composites owing to the simple and cost-effective device preparation processes. [108][109][110][111][112][113][114][115][116][117][118][119][120][121] Ideally, in a 0-3 type composite, ferroelectric particle to particle interactions in three directions are negligible. On the other hand, the polymer matrix has connectivity and hence interactions in all three directions.…”