LE GOUPIL, Florian; KALLITSIS, Konstantinos; TENCÉ‐GIRAULT, Sylvie; POURIAMANESH, Naser; BROCHON, Cyril; CLOUTET, Eric; SOULESTIN, Thibaut; DOMINGUES DOS SANTOS, Fabrice; STINGELIN, Natalie; HADZIIOANNOU, Georges

doi:10.1002/adfm.202007043

Métadonnées

Licence d’utilisation du document

LE GOUPIL, Florian
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies

KALLITSIS, Konstantinos
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies

TENCÉ‐GIRAULT, Sylvie
Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
Centre de recherche, développement, applications et technique de l'ouest [CERDATO]

Langue

Article de revue

Ce document a été publié dans

Advanced Functional Materials. 2020p. 2007043

Wiley

Résumé en anglais

Electrocaloric refrigeration is one of the most promising, environmentallyfriendly technology to replace current cooling platforms—if a notable electrocaloric effect (ECE) is realized around room temperature where the highest need is. Here, a straight-forward, one-pot chemical modification of P(VDF-ter-TrFE-ter-CTFE) is reported through the controlled introduction of small fractions of double bonds within the backbone that, very uniquely, decreases the lamellar crystalline thickness while, simultaneously, enlarging the crystalline coherence along the a-b plane. This increases the polarizability and polarization without affecting the degree of crystallinity or amending the crystal unit cell—undesirable effects observed with other approaches. Specifically, the permittivity increases by >35%, from 52 to 71 at 1 kHz, and ECE improves by >60% at moderate electric fields. At 40 °C, an adiabatic temperature change >2 K is realized at 60 MV m−1 (>5.5 K at 192 MV m−1), compared to ≈1.3 K for pristine P(VDF-ter-rFE-ter-CTFE), highlighting the promise of a simple, versatile approach that allows direct film deposition without requiring any post-treatment such as mechanical stretching or high-temperature annealing for achieving the desired performance.< Réduire

Mots clés en anglais

electrocaloric effect

ferroelectric polymer

microstructure tuning

Métadonnées

Partager cette publication !

Licence d’utilisation du document

Enhanced Electrocaloric Response of Vinylidene Fluoride–Based Polymers via One‐Step Molecular Engineering

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

URI

DOI

Origine

Unités de recherche