The Experts below are selected from a list of 915 Experts worldwide ranked by ideXlab platform
Laihui Luo - One of the best experts on this subject based on the ideXlab platform.
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batio3 mwnts polyvinylidene fluoride ternary Dielectric composites with Excellent Dielectric Property high breakdown strength and high energy storage density
ACS omega, 2019Co-Authors: Mingzhou Zhao, Yafei Hou, Laihui LuoAbstract:To improve the Dielectric performance of polyvinylidene fluoride (PVDF), BaTiO3/MWNTs/PVDF ternary composites were prepared by the solution casting method. The percolation threshold (fraction of MWNTs) has dropped greatly below 0.4 vol %, with the enhancement of Dielectric constant and breakdown field. For the BaTiO3/MWNTs/PVDF (11.5/0.35/88.15) composite, the Dielectric constant is 59, the loss is below 0.055, and the maximum operating electric field is 324 MV/m, so the discharged energy density can be of up to 10.3 J/cm3 with the efficiency of above 77.2%. The reason of improvement was revealed by the scanning electron microscope images and the X-ray diffraction data. It is found that uniform distribution of filler in the composites and the increase of the β phase of polymers result in the enhancement of polarization and improvement of Dielectric constant of PVDF. The third-phase spherical inorganic particles prevent the formation of conductive networks and improve the uniformity of local electric field...
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BaTiO3/MWNTs/Polyvinylidene Fluoride Ternary Dielectric Composites with Excellent Dielectric Property, High Breakdown Strength, and High-Energy Storage Density
2019Co-Authors: Mingzhou Zhao, Yafei Hou, Laihui LuoAbstract:To improve the Dielectric performance of polyvinylidene fluoride (PVDF), BaTiO3/MWNTs/PVDF ternary composites were prepared by the solution casting method. The percolation threshold (fraction of MWNTs) has dropped greatly below 0.4 vol %, with the enhancement of Dielectric constant and breakdown field. For the BaTiO3/MWNTs/PVDF (11.5/0.35/88.15) composite, the Dielectric constant is 59, the loss is below 0.055, and the maximum operating electric field is 324 MV/m, so the discharged energy density can be of up to 10.3 J/cm3 with the efficiency of above 77.2%. The reason of improvement was revealed by the scanning electron microscope images and the X-ray diffraction data. It is found that uniform distribution of filler in the composites and the increase of the β phase of polymers result in the enhancement of polarization and improvement of Dielectric constant of PVDF. The third-phase spherical inorganic particles prevent the formation of conductive networks and improve the uniformity of local electric field, so the breakdown strength of composites can be enhanced greatly. Here, this paper provides a method to get the composites with high energy storage density for supercapacitors
Mingzhou Zhao - One of the best experts on this subject based on the ideXlab platform.
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batio3 mwnts polyvinylidene fluoride ternary Dielectric composites with Excellent Dielectric Property high breakdown strength and high energy storage density
ACS omega, 2019Co-Authors: Mingzhou Zhao, Yafei Hou, Laihui LuoAbstract:To improve the Dielectric performance of polyvinylidene fluoride (PVDF), BaTiO3/MWNTs/PVDF ternary composites were prepared by the solution casting method. The percolation threshold (fraction of MWNTs) has dropped greatly below 0.4 vol %, with the enhancement of Dielectric constant and breakdown field. For the BaTiO3/MWNTs/PVDF (11.5/0.35/88.15) composite, the Dielectric constant is 59, the loss is below 0.055, and the maximum operating electric field is 324 MV/m, so the discharged energy density can be of up to 10.3 J/cm3 with the efficiency of above 77.2%. The reason of improvement was revealed by the scanning electron microscope images and the X-ray diffraction data. It is found that uniform distribution of filler in the composites and the increase of the β phase of polymers result in the enhancement of polarization and improvement of Dielectric constant of PVDF. The third-phase spherical inorganic particles prevent the formation of conductive networks and improve the uniformity of local electric field...
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BaTiO3/MWNTs/Polyvinylidene Fluoride Ternary Dielectric Composites with Excellent Dielectric Property, High Breakdown Strength, and High-Energy Storage Density
2019Co-Authors: Mingzhou Zhao, Yafei Hou, Laihui LuoAbstract:To improve the Dielectric performance of polyvinylidene fluoride (PVDF), BaTiO3/MWNTs/PVDF ternary composites were prepared by the solution casting method. The percolation threshold (fraction of MWNTs) has dropped greatly below 0.4 vol %, with the enhancement of Dielectric constant and breakdown field. For the BaTiO3/MWNTs/PVDF (11.5/0.35/88.15) composite, the Dielectric constant is 59, the loss is below 0.055, and the maximum operating electric field is 324 MV/m, so the discharged energy density can be of up to 10.3 J/cm3 with the efficiency of above 77.2%. The reason of improvement was revealed by the scanning electron microscope images and the X-ray diffraction data. It is found that uniform distribution of filler in the composites and the increase of the β phase of polymers result in the enhancement of polarization and improvement of Dielectric constant of PVDF. The third-phase spherical inorganic particles prevent the formation of conductive networks and improve the uniformity of local electric field, so the breakdown strength of composites can be enhanced greatly. Here, this paper provides a method to get the composites with high energy storage density for supercapacitors
C P Wong - One of the best experts on this subject based on the ideXlab platform.
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ultra low κ hfpdb based periodic mesoporous organosilica film with high mechanical strength for interlayer Dielectric
Journal of Materials Science, 2016Co-Authors: Yongju Gao, Guoping Zhang, Rong Sun, Jiawei Zhang, C P WongAbstract:A novel bridged organosilane precursor with star-shaped construction, [hexfluoropropane-2,2-diyl)dibenzyl-bridged organosilane (HFPDBO)], is prepared by facile organic synthesis method. The resultant HFPDBO precursor is mixed with porogen and acid catalyst to prepare periodic mesoporous organosilica (PMO) thin film via evaporation-induced self-assembly after spin-coating procedure. All the as-prepared HFPDB-based PMO thin film has been characterized by Fourier transform infrared spectroscopy, nuclear magnetic resonance spectrum, scanning electron microscopy, transmission electron microscope, and small-angle X-ray diffraction, respectively. Thereinto, the HFPDB-based PMO thin film with weight ratio of porogen to precursor (0.75:1) possesses Excellent Dielectric Property (1.58@1 MHz of Dielectric constants), high mechanical Property (5.54 ± 0.11 GPa of Young’s modulus) and hydrophobic Property (90.1° of water contact angle) simultaneously. These low Dielectric constant, high mechanical strength, and the hydrophobicity suggest potential application of the HFPDB-based PMO thin films as low-k materials in microelectronics.
Yafei Hou - One of the best experts on this subject based on the ideXlab platform.
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batio3 mwnts polyvinylidene fluoride ternary Dielectric composites with Excellent Dielectric Property high breakdown strength and high energy storage density
ACS omega, 2019Co-Authors: Mingzhou Zhao, Yafei Hou, Laihui LuoAbstract:To improve the Dielectric performance of polyvinylidene fluoride (PVDF), BaTiO3/MWNTs/PVDF ternary composites were prepared by the solution casting method. The percolation threshold (fraction of MWNTs) has dropped greatly below 0.4 vol %, with the enhancement of Dielectric constant and breakdown field. For the BaTiO3/MWNTs/PVDF (11.5/0.35/88.15) composite, the Dielectric constant is 59, the loss is below 0.055, and the maximum operating electric field is 324 MV/m, so the discharged energy density can be of up to 10.3 J/cm3 with the efficiency of above 77.2%. The reason of improvement was revealed by the scanning electron microscope images and the X-ray diffraction data. It is found that uniform distribution of filler in the composites and the increase of the β phase of polymers result in the enhancement of polarization and improvement of Dielectric constant of PVDF. The third-phase spherical inorganic particles prevent the formation of conductive networks and improve the uniformity of local electric field...
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BaTiO3/MWNTs/Polyvinylidene Fluoride Ternary Dielectric Composites with Excellent Dielectric Property, High Breakdown Strength, and High-Energy Storage Density
2019Co-Authors: Mingzhou Zhao, Yafei Hou, Laihui LuoAbstract:To improve the Dielectric performance of polyvinylidene fluoride (PVDF), BaTiO3/MWNTs/PVDF ternary composites were prepared by the solution casting method. The percolation threshold (fraction of MWNTs) has dropped greatly below 0.4 vol %, with the enhancement of Dielectric constant and breakdown field. For the BaTiO3/MWNTs/PVDF (11.5/0.35/88.15) composite, the Dielectric constant is 59, the loss is below 0.055, and the maximum operating electric field is 324 MV/m, so the discharged energy density can be of up to 10.3 J/cm3 with the efficiency of above 77.2%. The reason of improvement was revealed by the scanning electron microscope images and the X-ray diffraction data. It is found that uniform distribution of filler in the composites and the increase of the β phase of polymers result in the enhancement of polarization and improvement of Dielectric constant of PVDF. The third-phase spherical inorganic particles prevent the formation of conductive networks and improve the uniformity of local electric field, so the breakdown strength of composites can be enhanced greatly. Here, this paper provides a method to get the composites with high energy storage density for supercapacitors
Xianzhong Tang - One of the best experts on this subject based on the ideXlab platform.
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low temperature synthesis of polyimide poly vinylidene fluoride composites with Excellent Dielectric Property
Materials Letters, 2017Co-Authors: Xin Mao, Wenfeng Guo, Jie Yang, Xianzhong TangAbstract:Abstract All-organic polyimide (PI)/poly(vinylidene fluoride) (PVDF) composite materials with high Dielectric constant and low Dielectric loss were fabricated via solution blending followed by the chemical imidization of polyamic acid (PAA, precursor of PI) at a low temperature. The Dielectric and thermal properties of the PI/PVDF composites were investigated. Results indicated that the Dielectric properties of the composites were significantly increased due to the incorporation of PVDF, and the composites exhibited Excellent thermal stability. The Dielectric constant of the composites was sharply increased to 7.745 at 1 kHz, which was approximately 2.1 times higher than that of pure PI. The Dielectric loss was only 0.0898 when PVDF content was as high as 50 wt.%. Moreover, the dependence of the Dielectric constant and Dielectric loss on frequency was studied. Within the testing frequency range of 100 Hz–1 MHz, the Dielectric constant of the composites slightly decreased and the Dielectric loss was less than 0.12. The results demonstrated that the PI/PVDF composites were promising Dielectric materials for modern electronic applications.
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preparation and characterization of pi pvdf composite films with Excellent Dielectric Property
Journal of Materials Science: Materials in Electronics, 2017Co-Authors: Xin Mao, Wenfeng Guo, Jie Yang, Xianzhong TangAbstract:All-organic polyimide (PI)/poly(vinylidene fluoride) (PVDF) composite materials with high Dielectric constant and low Dielectric loss were fabricated via solution blending. The Dielectric, mechanical, and thermal properties of the PI/PVDF composite films were studied. Results indicated that the Dielectric properties of the composites were highly reinforced through the introduction of PVDF, and the composites exhibited Excellent thermal stability. When the mass fraction of PVDF was adjusted to 30 wt%, the specimen demonstrated Excellent thermal properties, superior mechanical properties, high Dielectric constant (5.7, 1 kHz), and low Dielectric loss (0.009, 1 kHz). Moreover, the dependence of the Dielectric constant and Dielectric loss on frequency was investigated. The composite presented stable Dielectric constant and Dielectric loss that were less than 0.04 within the testing frequency range of 100 Hz–10 MHz. This study demonstrated that the PI/PVDF composites were potential Dielectric materials in the field of electronics.
