Piezoelectric Energy Harvesting from a Ferroelectric Hybrid Salt [Ph₃MeP]₄[Ni(NCS)₆] Embedded in a Polymer Matrix

Abstract

Organic–inorganic hybrid ferroelectrics are an exciting class of molecular materials with promising applications in the area of energy and electronics. The synthesis, ferroelectric and piezoelectric energy harvesting behavior of a 3d metal ion‐containing A4BX6 type organic–inorganic hybrid salt [Ph3MeP]4[Ni(NCS)6] (1) is now presented. P‐E hysteresis loop studies on 1 show a remnant ferroelectric polarization value of 18.71 μC cm−2, at room temperature. Composite thermoplastic polyurethane (TPU) devices with 5, 10, 15 and 20 wt % compositions of 1 were prepared and employed for piezoelectric energy harvesting studies. A maximum output voltage of 19.29 V and a calculated power density value of 2.51 mW cm−3 were observed for the 15 wt % 1‐TPU device. The capacitor charging experiments on the 15 wt % 1‐TPU composite device shows an excellent energy storage performance with the highest stored energies and measured charges of 198.8 μJ and 600 μC, respectively.

Discrete Molecular Copper(II) Complex for Efficient Piezoelectric Energy Harvesting Above Room‐Temperature

“…A distinct dielectric anomaly was observed around 350 K with a peak value of 46.3 (at 1 kHz) in the plot of the real part of the dielectric permittivity ( ϵ ′) as a function of temperature (Figure S8, Supporting Information). The observed dielectric loss (tan δ ) of 1 is 0.748 at 1 kHz and both the values of ϵ ′ and tan δ are in the expected range of discrete molecular ferroelectrics reported in the literature [8–15] . Noteworthily this tanδ value is relatively higher as compared to that of the ferroelectric piezoceramics, which is a common scenario for molecular complexes.…”

“…The 10 wt % composite was found to show a high value output voltage of 8 V, short‐circuit current of 5 μA, and a power density of 0.85 μW cm −2 . Such an output characteristic is extremely challenging to achieve in discrete molecular complexes and not surprisingly scarce in the literature [5, 10, 11] …”

Metal ion induced dual switchable dielectric and luminescent properties in hybrid halides

“…34,35 As dielectric materials, the dielectric response signal shows a significant abnormality near the phase transition temperature. [36][37][38] The dielectric constant rises sharply as the temperature rises to the phase transition temperature because the phase transition of the crystal structure triggered by the molecular order-disorder change exhibits significant dielectric anomalies near the phase transition temperature. The dielectric constants of compound 1 and compound 4 are measured, respectively.…”

“…In recent years, organic-inorganic hybrid materials [1][2][3][4] with multiple functions have received widespread attention in the fields of optoelectronics, 5,6 photoluminescence, [7][8][9] and sensors because of their excellent ferroelectric properties, [10][11][12][13][14] optical properties, dielectric properties, and phase transition properties. [15][16][17][18] Compared with traditional inorganic or organic non-hybrid materials, the obvious advantage of organic-inorganic hybrid materials [19][20][21] lies in the modification of their structure, which in turn achieves richer functions, such as photoluminescence, dual-phase change, and so on.…”

Exploring Helical Peptides and Foldamers for the Design of Metal Helix Frameworks: Current Trends and Future Perspectives

“…Another exciting future perspective of these helical frameworks is their application as piezoelectric energy harvesters providing the demanding global energy consumption and technological progression. Traditional energy harvesters based on inorganic ceramic oxides, piezoelectric polymers, and organic and hybrid organic‐inorganic materials show excellent energy harvesting performance [89, 90] . However, these materials pertain to certain limitations such as the presence of toxic lead and heavy metal content, high density, high stiffness, high‐temperature synthesis, and lack of bio‐compatibility, hindering their use for flexible and wearable electronic applications [91] .…”