Coupling Enhanced Performance of Triboelectric–Piezoelectric Hybrid Nanogenerator Based on Nanoporous Film of Poly(vinylidene fluoride)/BaTiO₃ Composite Electrospun Fibers

Abstract

Nanogenerators have received much attention due to their potential applications in mechanical energy harvesting and self-powered sensing. Despite the fast development of nanogenerators, improving their performances via effective strategies still remains a great challenge. Herein, we report a ternary coupling effect of a triboelectric–piezoelectric hybrid nanogenerator based on the nanoporous film of poly­(vinylidene fluoride)/BaTiO3 composite nanofibers prepared by electrospinning. The transfer charge density of the triboelectric–piezoelectric hybrid nanogenerator in the optimal coupling state is 2.12 times that of the sum value of the pristine nanoporous piezoelectric and triboelectric nanogenerators as references, which can reach up to 105.6 μC m–2. Enhanced performances of the hybrid nanogenerator are attributed to the improved synergistic coupling for triple effects of pore dipole, triboelectricity, and piezoelectricity. Furthermore, the wearable hybrid nanogenerator is demonstrated to be able to harvest biomechanical energy from actions in life. Our findings provide an effective method for developing high-performance nanogenerators.

Harsh Environmental-Tolerant and High-Performance Triboelectric Nanogenerator Based on Nanofiber/Microsphere Hybrid Membranes

“…The detailed fabrication process for the flexible HO-TENG in this study is schematically presented in Scheme 1 . In brief, a series of single-electrode mode flexible HO-TENGs was established through electrospinning assisted with elecrospraying technology, in which PVDF-HFP has excellent tribo-electronegativity owing to its high electron affinity, large spontaneous polarization, and excellent polarization stability [ 48 , 49 , 50 ]. Therefore, PVDF-HFP is used as the triboelectric matrix material in this study, and the fabricated FM and FSHM were used as the tribo-electronegative layer, and the receiving matrix conductive fabric as the electrode.…”

A new multifunctional energy harvester based on mica nanosheet-dispersed PVDF nanofabrics featuring piezo-capacitive, piezoelectric and triboelectric effects

“…29,35,78 A lower dielectric constant, a lower β-phase content, and increased dielectric loss were all contributing factors to reduced triboelectric output at the highest loading of the MNS. 29,35,[77][78][79][80] Since PVDF/MNS composite nanofabric containing 0.75 wt% of MNS showed the highest V OC among the PVDF/ MNS composite nanofabrics, it was used for the instant power density measurement (Fig. 12(b)).…”

Recent Progress of Nanogenerators for Green Energy Harvesting: Performance, Applications, and Challenges

“…In comparison to individual nanogenerators, this nanogenerator type can provide high and efficient power density [ 95 ]. Recent research has led to the development of hybrid nanogenerators based on piezoelectric–pyroelectric [ 96 , 97 , 98 ], triboelectric–piezoelectric [ 31 , 99 , 100 , 101 , 102 , 103 , 104 , 105 , 106 , 107 , 108 , 109 , 110 , 111 , 112 , 113 , 114 , 115 , 116 , 117 ], electromagnetic–triboelectric [ 118 , 119 , 120 , 121 , 122 , 123 , 124 , 125 , 126 , 127 , 128 , 129 , 130 , 131 , 132 ], triboelectric–piezoelectric–pyroelectric [ 133 , 134 , 135 , 136 ], triboelectric–piezoelectric–electromagnetic [ 137 , 138 , 139 , ...…”