A novel tri-layer flexible piezoelectric nanogenerator based on surface- modified graphene and PVDF-BaTiO3 nanocomposites

Dielectric and energy harvesting properties of FeTiNbO6/PVDF composites with reinforced sandwich structure

“…In this case, the FTN/PVDF middle layer possesses high conductivity, which can provide more space charge and help to form a stronger self‐built electric field during the material deformation process, leading to the enhancement in the AC voltage output values. On the other hand, with the protection of BT/PVDF insulation layer, the sandwich structured composites can be effectively poled and meantime, the FTN/PVDF middle layer is benefit in reducing the internal resistance, yielding the high output power characteristics .…”

A Flexible Lead‐Free BaTiO3/PDMS/C Composite Nanogenerator as a Piezoelectric Energy Harvester

“…[18][19][20][21][22] Piezoelectric nanocomposites composedo fp iezoelectric NPs and flexible polymers have demonstrated remarkable flexibility when used in flexible devices and wearable applications. [23][24][25][26][27] For example,K im [28] reported the silk-fibroin-based biodegradable piezoelectric composite nanogenerators using lead-free ferroelectric nanoparticles (BaTiO 3 ,Z nSnO 3 ,B i 0.5 (Na 0.82 K 0.18 ) 0.5 TiO 3 ,a nd K 0.5 Na 0.5 Nb 0.995 Mn 0.005 O 3 ), which could obtain maximum output voltages and current densities of 2.2 Va nd 0.12 mAcm À2 .S hin [29] reported high-performance flexible NGs based on ac omposite thin film composed of hemispherically aggregated BaTiO 3 NPs and poly-(vinylidene fluoride-co-hexafluoropropene) P(VDF-HFP), whiche xhibited high electricalo utput up to 5Vand 750 nA by cyclic measurementu nder bending. Park [30] reported an anocomposite generator (NCG) that achived as imple, low-cost, and large area fabrication based on BaTiO 3 NPs synthesized via ah ydrothermal reaction and graphitic carbons (such as singlewalled and multiwalled carbon nanotubes and reduced graphene oxide), which repeatedly generateda no pen-circuit voltage (V oc )o fa pproximately 3.0 Va nd as hort-circuit current signal of 300 nA.…”

Flexible tri-layer piezoelectric nanogenerator based on PVDF-HFP/Ni-doped ZnO nanocomposites

“…Over the past few years, great efforts have been dedicated to develop high performance energy harvesters for various applications, such as self powered sensors, smart skins and wearable/portable electronics. [1][2][3] Piezoelectric materials have attracted much interest in the eld of smart and biocompatible devices, since they convert mechanical energy into electricity by using nanoscale structures. 4,5 The most commonly employed piezoelectric materials are lead zirconate-titanate, barium titanate, lithium niobate, and zinc oxide because of its advantages such as high piezoelectric and dielectric properties; however these ceramics are brittle.…”