Ultrahigh ß-phase content poly(vinylidene fluoride) with relaxor-like ferroelectricity for high energy density capacitors.
Nat Commun
; 10(1): 4535, 2019 10 18.
Article
en En
| MEDLINE
| ID: mdl-31628311
ABSTRACT
Poly(vinylidene fluoride)-based dielectric materials are prospective candidates for high power density electric storage applications because of their ferroelectric nature, high dielectric breakdown strength and superior processability. However, obtaining a polar phase with relaxor-like behavior in poly(vinylidene fluoride), as required for high energy storage density, is a major challenge. To date, this has been achieved using complex and expensive synthesis of copolymers and terpolymers or via irradiation with high-energy electron-beam or γ-ray radiations. Herein, a facile process of pressing-and-folding is proposed to produce ß-poly(vinylidene fluoride) (ß-phase content ~98%) with relaxor-like behavior observed in poly(vinylidene fluoride) with high molecular weight > 534 kg mol-1, without the need of any hazardous gases, solvents, electrical or chemical treatments. An ultra-high energy density (35 J cm-3) with a high efficiency (74%) is achieved in a pressed-and-folded poly(vinylidene fluoride) (670-700 kg mol-1), which is higher than that of other reported polymer-based dielectric capacitors to the best of our knowledge.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
Nat Commun
Asunto de la revista:
BIOLOGIA
/
CIENCIA
Año:
2019
Tipo del documento:
Article
País de afiliación:
Reino Unido