Colossal Dielectric Response of PVDF-HFP Amalgamated Ultra-Low-Density Metal-Derived Nanoparticles: Frontier of an Excellent Charge Separator

• Published in: Journal of electronic materials Vol. 48; no. 9; pp. 5570 - 5580
• Main Authors: Mondal, D., Gayen, A. L., Paul, B. K., Bhar, D. S., Das, K., Nandy, P., Das, S.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-09-2019; Springer Nature B.V
• Subjects: Beta phase; Characterization and Evaluation of Materials; Chemistry and Materials Science; Density; Diodes; Doping; Electrical properties; Electrical resistivity; Electronics and Microelectronics; Fluorides; Impregnation; Instrumentation; Materials Science; Nanoparticles; Optical and Electronic Materials; Organic light emitting diodes; Polyvinylidene fluorides; Separators; Solid State Physics; Vinylidene fluoride; Doped PVDF-HFP; phase; Ultra-low-density triturated metal nanoparticle; Electrical property; Separator of a charge storage device
• ISSN: 0361-5235; 1543-186X
• DOI: 10.1007/s11664-019-07401-5

As a high-dielectric separator, a wide variety of polymers like poly(vinylidene fluoride) (PVDF) and its co-polymer such as poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) are commonly employed due to having modifiable electrical properties with impregnating suitable dopants in the fabrication of a high-performance charge storage device. In this report, improvement of efficiency has been studied by tuning the doping concentration of triturated material like ultra-low-density copper sulphate (ULDCS) within PVDF-HFP matrix and found a massive increment in
β
phase (
β
%), dielectric constant (
ε
r
) and ac conductivity (
σ
ac
) with ∼ 2.3, ∼ 56 and ∼ 21 fold (at 100-Hz frequency), respectively, at a critical percentage of 10-ml doping compared to the pristine polymer matrix. One crucial factor like dielectric leakage has been taken into account intensely with reduction of ∼ 2.6 times at 100-Hz frequency with respect to the pristine one to obtain excellent behaviour of the separator. These extremely desirable properties can make the sample a very promising candidate to be used as a high-dielectric separator of an extraordinary charge storage device. In this context, a super-charge storage device has been fabricated using our synthesized high-dielectric material as a separator, and the device performance is amplified to a greater extent. Generation of high potential up to 3.77 V with high rate of retentivity (∼ 88.86%) is the key function of our device, and the efficiency of the device has also been verified by lighting up to 25 light-emitting diodes (LEDs) for 10 min.