High power mechanical energy harvester based on exfoliated black phosphorous–polymer composite and its multiple applications

Abstract

A uniformly dense dispersion of few layer BP (FLBP) nanosheets in PDMS (polydimethylsiloxane) matrix is shown to exhibit a remarkably strong mechanical energy harvesting effect with highest peak-to-peak voltage output of about 350 V.

Flexible Piezoelectric Nanogenerators Based on One-Dimensional Neutral Coordination Network Composites

“…The cross-sectional SEM images of a representative 1 -TPU device indicate the thickness of the 1 -TPU thin film to be ≈0.47 mm (Figure S27, Supporting Information). The output performance of all these 1 -TPU devices was estimated by applying constant compressive force from a home-built impact stimulator . Prior to the experiment, all the 1 -TPU composite films were subjected to a poling process at an electric field of 25 kV/cm for about 2 h at room temperature to orient the disordered electric dipoles along the electric field direction.…”

“…The output perform- ance of all these 1-TPU devices was estimated by applying constant compressive force from a home-built impact stimulator. 54 Prior to the experiment, all the 1-TPU composite films were subjected to a poling process at an electric field of 25 kV/cm for about 2 h at room temperature to orient the disordered electric dipoles along the electric field direction. The open-circuit voltage (V oc ) of the devices was recorded under an impact force of 40 N at a frequency of 17 Hz, from each of the devices with an active area of 1.3 × 2 cm 2 .…”

Neutral 1D Perovskite-Type ABX3 Ferroelectrics with High Mechanical Energy Harvesting Performance

“…The d 33 measurement on the single crystals of 1 was performed using a Piezotest meter model PM300 . The output signals of 1 –PDMS devices were generated by periodic compression and the release of 40 N force produced by a home-built vertical impact force setup . All of the output signals were collected using a Keithley DMM7510 7.5 multimeter.…”

Facet Engineering by Sculpting Artificial Edges on 2D Black Phosphorus for Localized and Selective Piezoelectric Response

“…This distortion causes variations in bond lengths and angles, contributing to in-plane anisotropy. The lack of inversion symmetry and the anisotropic nature of BP arises due to the puckered honeycomb lattice of phosphorus atoms, which results in the presence of an intrinsic electric dipole moment in the crystal structure. ,, Such characteristics give rise to anisotropy in optical, thermal, mechanical, and electronic responses, making it more interesting. , Theoretical investigations have revealed the presence of piezoelectric and ferroelectric properties in BP, which have been experimentally studied in the context of various electromechanical devices, such as piezotronics, piezoelectric energy harvesting devices, piezoelectric nanogenerators, etc. − While due to the presence of active sites, such as edges and nanostructures, extensive studies on 2D materials are explored in diverse phenomena, including localized conductivity, quantum spin Hall effects, optical responses, and electrocatalytic behaviors, with edges displaying pronounced reactivity. − Although many experimental efforts were made on 2D materials to explore their piezoelectric properties, so far no efforts were made to identify the active facets of polarization, thereby deciphering the piezoelectric coefficients in different facets (basal plane, edges) of the flake to achieve a very basic and detailed understanding of piezoresponse and its selectivity in 2D structures.…”

“…24,26,27 Such characteristics give rise to anisotropy in optical, thermal, mechanical, and electronic responses, making it more interesting. 28,29 Theoretical investigations have revealed the presence of piezoelectric and ferroelectric properties in BP, which have been experimentally studied in the context of various electromechanical devices, such as piezotronics, piezoelectric energy harvesting devices, piezoelectric nanogenerators, etc. 29−38 While due to the presence of active sites, such as edges and nanostructures, extensive studies on 2D materials are explored in diverse phenomena, including localized conductivity, quantum spin Hall effects, optical responses, and electrocatalytic behaviors, with edges displaying pronounced reactivity.…”