Multifunctional Properties of Polyvinylidene-Fluoride-Based Materials: From Energy Harvesting to Energy Storage

Abstract

Organic ferroelectrics are increasingly important due to their complementary properties to classical, inorganic ferroelectrics. Flexibility, chemical resistance, scalability, high breakdown fields, and biocompatibility are attractive for many applications like energy harvesting and storage. The most known energy harvesting methods are piezoelectric, pyroelectric, and triboelectric. Here, we apply the well-established material's figures of merit to five polyvinylidenefluoride-based compositions ranging from ferroelectric to relaxor-like behavior to emphasize the importance of several key material parameters contributing to the maximal power output of energy harvesting devices. Afterward, we discuss the possibility of the same functional material storing the output energy for the development of scalable multifunctional devices.

BiFeO3 Nanoparticles: The “Holy‐Grail” of Piezo‐Photocatalysts?

“…The effective macroscopic piezoelectric coefficient d is determined from the derivative of the strain with respect to the field at strain zero and is found to be d = −16 pm V −1 , which corresponds to the value of pure P(VDF‐TrFE) copolymer. [ 24 ] This macroscopic measurement allows us to have an absolute value of P(VDF‐TrFE) that we will use to extract the response of the BFO by local PFM measurement. Local PFM measurements are depicted in Figure 1d.…”

Mechanistic Study of Rhodamine B Piezocatalytic Decomposition Using Poly(vinylidene difluoride) and Related Polymers

“…50 The reaction to this process is (6) where k 1 and k −1 are the adsorption and desorption rate constants, respectively. The temporal change of the absorbance spectra at λ max can be to a simple exponential decay (7) as shown in the Supporting Information, where…”

“…There has been increasing interest in using the piezoelectric effect in a variety of applications, such as energy harvesting, − tactile sensors, − biology, − and chemical catalysis. − Typically, mechanical motion is used to invoke an electric field on the surface of the piezoelectric material, and this electric field influences the reactivity of the surrounding medium. In general, the piezoelectric material used is a metal oxide since it can have large electrical–mechanical coupling coefficients.…”

Double-Bond-induced Morphotropic Phase Boundary leads to Enhanced Electrocaloric Effect in VDF-Based Polymer Flexible Devices

“…It displays a remarkably high permittivity, ε r ∼ 50, with low hysteresis (P r ∼ 0), making it the most promising polymer for ECE cooling with reported ΔT EC ∼ 3 K at a moderate field of 60 MV•m −1 . 18,20,21 Several strategies have been explored to further increase the ECE of these state-of-the-art materials. Among them, blending with VDF-rich P(VDF-co-TrFE) has yielded good results with ΔT EC = 4 K reported at 60 MV•m −1 .…”

“…Consequently, a complete crossover to the RFE behavior is obtained in poly­(vinylidenefluoride- ter -trifluoroethylene- ter -chlorofluoro-ethylene) (P­(VDF- ter -TrFE- ter -CFE); 63/30/7) with a phase transition near RT. It displays a remarkably high permittivity, ε r ∼ 50, with low hysteresis ( P r ∼ 0), making it the most promising polymer for ECE cooling with reported Δ T EC ∼ 3 K at a moderate field of 60 MV·m –1 . ,, Several strategies have been explored to further increase the ECE of these state-of-the-art materials. Among them, blending with VDF-rich P­(VDF- co -TrFE) has yielded good results with Δ T EC = 4 K reported at 60 MV·m –1 .…”