Enhanced Electrocaloric Effect in Relaxor Ferroelectric Terpolymers by Morphotropic Phase Boundary
Authors:
Abstract
Relaxor ferroelectric terpolymers with a disordered helical relaxor conformation are promising candidates for developing electrocaloric cooling applications. However, most current studies focus on the electrocaloric effect in terpolymers with high chiral commoners, which remains relatively small in the low‐electric‐field regime. In this work, other than using typical helical relaxor compositions, it is reported that poly(vinylidene fluoride‐trifluoroethylene‐chlorofluoroethylene) terpolymer with its composition close to the morphotropic phase boundary may enable markedly enhanced electrocaloric effect, especially in the low‐electric‐field regime. The adiabatic temperature change of 3.2 K is achieved by a low electric field of 50 MV m −1 at room temperature, corresponding to ≈90% enhancement over pure relaxor counterparts. The improved electrocaloric response is attributed to the electric‐field‐induced disorder‐to‐order phase transition. These findings offer an alternative, promising route for the practical use of electrocaloric polymers for refrigeration devices.Keywords
Funding Information
- National Natural Science Foundation of China (12274152, 92366302)
This publication has 45 references indexed in Scilit:
- Direct measurement of electrocaloric effect in P(VDF-TrFE-CFE) film using infrared imagingJournal of Materiomics, 2022
- Room‐Temperature Symmetric Giant Positive and Negative Electrocaloric Effect in PbMg0.5W0.5O3 Antiferroelectric CeramicAdvanced Functional Materials, 2021
- Relaxor Ferroelectric Polymers: Insight into High Electrical Energy Storage Properties from a Molecular PerspectiveSmall Science, 2021
- Enhanced Electrocaloric Response of Vinylidene Fluoride–Based Polymers via One‐Step Molecular EngineeringAdvanced Functional Materials, 2020
- An All‐Scale Hierarchical Architecture Induces Colossal Room‐Temperature Electrocaloric Effect at Ultralow Electric Field in Polymer NanocompositesAdvanced Materials, 2020
- Observation of a Negative Thermal Hysteresis in Relaxor Ferroelectric PolymersAdvanced Functional Materials, 2020
- Interfacial Coupling Boosts Giant Electrocaloric Effects in Relaxor Polymer Nanocomposites: In Situ Characterization and Phase‐Field SimulationAdvanced Materials, 2018
- Giant Negative Electrocaloric Effect in Antiferroelectric La‐Doped Pb(ZrTi)O3 Thin Films Near Room TemperatureAdvanced Materials, 2015
- Relaxor Ferroelectric‐Based Electrocaloric Polymer Nanocomposites with a Broad Operating Temperature Range and High Cooling EnergyAdvanced Materials, 2015
- Ferroelectric Polymer Nanocomposites for Room‐Temperature Electrocaloric RefrigerationAdvanced Materials, 2015