1 research outputs found
Fully Rollable Lead-Free Poly(vinylidene fluoride)-Niobate-Based Nanogenerator with Ultra-Flexible Nano-Network Electrodes
A fully
rollable nanocomposite-based nanogenerator (NCG) is developed
by integrating a lead-free piezoelectric hybrid layer with a type
of nanofiber-supported silver nanowire (AgNW) network as electrodes.
The thin-film nanocomposite is composed of electroactive polyvinylidene
fluoride (PVDF) polymer matrix and compositionally modified potassium
sodium niobate-based nanoparticles (NPs) with a high piezoelectric
coefficient (<i>d</i><sub>33</sub>) of 53 pm/V, which is
revealed by the piezoresponse force microscopy measurements. Under
periodical agitation at a compressive force of 50 N and 1 Hz, the
NCG can steadily render high electric output up to an open-circuit
voltage of 18 V and a short-circuit current of 2.6 μA. Of particular
importance is the decent rollability of the NCG, as indicated by the
negligible decay in the electric output after it being repeatedly
rolled around a gel pen for 200 cycles. Besides, the biocompatible
NCG can potentially be used to scavenge biomechanical energy from
low-frequency human motions, as demonstrated by the scenarios of walking
and elbow joint movement. These results rationally expand the feasibility
of the developed NCG toward applications in lightweight, diminutive,
and multifunctional rollable or wearable electronic devices