Enhanced dielectric and energy storage density induced by surface-modified BaTiO3 nanofibers in poly(vinylidene fluoride) nanocomposites

Liu, Shaohui; Xue, Songbai; Zhang, Wenqin; Zhai, Jiwei

doi:10.1016/j.ceramint.2014.07.083

Cited by 108 publications

(43 citation statements)

References 34 publications

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“…5,[16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] The ferroelectric polymers, such as poly(vinylidene fluoride) (PVDF) and its copolymer, have been widely used as matrix because of their relatively high k. 14,15 Recent literatures have demonstrated that the high-aspect-ratio ceramic fillers can enhance the dielectric constant of nanocomposites more efficiently than their corresponding spherical particles. [32][33][34][35][36][37][38][39][40][41][42][43] For example, Tang et al reported that dielectric constant of nanocomposites with 17.5 vol.% loading of BaTiO 3 nanowires can reach up to 69.5, while that of nanocomposites with 30 vol.% BaTiO 3 nanoparticles is just about 52, by using the poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)) as the polymer matrix. 35 Furthermore, the energy storage density of the aforementioned nanocomposites is more than 45.3% higher than that of neat P(VDF-TrFE-CFE) under the electric field of 300 MV m -1 .…”

Section: Introductionmentioning

confidence: 99%

Tailoring Dielectric Properties and Energy Density of Ferroelectric Polymer Nanocomposites by High-k Nanowires

Wang

Huang

Jiang

2015

ACS Appl. Mater. Interfaces

198

144

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High dielectric constant (k) polymer nanocomposites have shown great potential in dielectric and energy storage applications in the past few decades. The introduction of high-k nanomaterials into ferroelectric polymers has proven to be a promising strategy for the fabrication of high-k nanocomposites. One-dimensional large-aspect-ratio nanowires exhibit superiority in enhancing k values and energy density of polymer nanocomposites in comparison to their spherical counterparts. However, the impact of their intrinsic properties on the dielectric properties of polymer nanocomposites has been seldom investigated. Herein, four kinds of nanowires (Na2Ti3O7, TiO2, BaTiO3, and SrTiO3) with different inherent characteristics are elaborately selected to fabricate high-k ferroelectric polymer nanocomposites. Dopamine functionalization facilitates the excellent dispersion of these nanowires in the ferroelectric polymer matrix because of the strong polymer/nanowire interfacial adhesion. A thorough comparative study on the dielectric properties and energy storage capability of the nanowires-based nanocomposites has been presented. The results reveal that, among the four types of nanowires, BaTiO3 NWs show the best potential in improving the energy storage capability of the proposed nanocomposites, resulting from the most signficant increase of k while retaining the rather low dielectric loss and leakage current.

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Section: Introductionmentioning

confidence: 99%

Tailoring Dielectric Properties and Energy Density of Ferroelectric Polymer Nanocomposites by High-k Nanowires

Wang

Huang

Jiang

2015

ACS Appl. Mater. Interfaces

198

144

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“…The BST NF prepared via electrospinning [28][29][30] and surface-modified by 3-aminopropyltriethoxysilane (APS) are employed as dielectric fillers in PVDF-based composites. And untreated 2.5 vol% BST NF-APS/PVDF composites films in a thickness of 10-15 μm is prepared via casting the BST NF-APS and PVDF solution in dimethylformamide onto a oxide (ITO) glass (bottom electrode) followed by drying under vacuum at 60 1C for 10 h. The quenched BST NF-APS/PVDF composite film is prepared via heating the untreated film at 200 1C for 10 min then quenched in an ice-water bath immediately, and subsequently dried at 40 o C for 24 h. Top Au electrodes were deposited on the surfaces of the composites films using a shadow mask for electrical measurements.…”

Section: Methodsmentioning

confidence: 99%

The influence of crystalline transformation of Ba0.6Sr0.4TiO3 nanofibers/poly(vinylidene fluoride) composites on the energy storage properties by quenched technique

Liu

Xue

Zhang

et al. 2015

Ceramics International

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“…(8)(9)(10)(11)(12)(13) Ideally, a larger volume fraction of PZT corresponds to improved piezoelectric and dielectric properties; however, when the volume fraction of PZT is larger than 70%, the flexibility and strength of the composites can be greatly reduced. (14,15) Furthermore, the PZT particles may aggregate and be deposited in large numbers at a high volume fraction of PZT, decreasing the piezoelectric and dielectric performance of the composites. (16) Therefore, simultaneously improving the flexibility and the piezoelectric and dielectric properties of PZT/polymer composites remains a major challenge for realizing their applications.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Large-Area and Flexible Lead Zirconate Titanate/Polyvinyl-Butyral/Additives Composite Films for Piezoelectric Sensor Application

2016

Sensors and Materials

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To satisfy the requirement of structural health monitoring (SHM) using light sensors with high sensitivity, novel large-area and flexible lead zirconate titanate (PZT)/polyvinyl-butyral (PVB)/ additives composite films were fabricated by the tape casting method. The microstructure and the piezoelectric and dielectric properties of the PZT/PVB/additives composite films were investigated systematically. Owing to the additives (dibutyl phthalate + castor oil), the flexibility and uniformity of the PZT/PVB composite films were improved significantly compared with conventional PZT/ PVB composite films. Moreover, the surfaces of the PZT/PVB/additives composite films are smooth and highly resistant to cracking. Scanning electron microscopy (SEM) was adopted to analyze the microstructure of the films. The microstructure analysis shows that microholes exist in the PZT/PVB composite films and an agglomeration phenomenon is noticeable. In contrast, PZT particles are well dispersed in the PVB matrix and there are few obvious microholes in the PZT/PVB/additives composite films. Furthermore, from energy-dispersive spectroscopy (EDS) results, it can be concluded that PZT particles were deposited at the bottom surface of the PZT/ PVB composite films. However, uniform deposition of PZT particles is achieved in the PZT/PVB/ additives composite films. In addition, owing to the additives, the improvement of the piezoelectric and dielectric properties of PZT/PVB/additives composite films is observed at a high volume fraction of PZT [φ (PZT) > 60%]. At φ (PZT) = 85%, the largest piezoelectric constant (d 33 ) reaches 44 pC/N, which is much higher than that of the reported PZT/PVDF films and PZT/PVB films. Moreover, the dielectric constant (ε r ) of the PZT/PVB/additives composite films (at room temperature and a frequency of 1 kHz) is higher than that of the PZT/PVB composite films with the same φ (PZT), and the dielectric loss (tanδ) is lower. Both the improved piezoelectric and dielectric properties are desirable for new piezoelectric sensor applications.

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Enhanced dielectric and energy storage density induced by surface-modified BaTiO3 nanofibers in poly(vinylidene fluoride) nanocomposites

Cited by 108 publications

References 34 publications

Tailoring Dielectric Properties and Energy Density of Ferroelectric Polymer Nanocomposites by High-k Nanowires

Tailoring Dielectric Properties and Energy Density of Ferroelectric Polymer Nanocomposites by High-k Nanowires

The influence of crystalline transformation of Ba0.6Sr0.4TiO3 nanofibers/poly(vinylidene fluoride) composites on the energy storage properties by quenched technique

Preparation and Characterization of Large-Area and Flexible Lead Zirconate Titanate/Polyvinyl-Butyral/Additives Composite Films for Piezoelectric Sensor Application

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