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Polymers for Film Capacitors

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (30 September 2017) | Viewed by 13418

Special Issue Editors


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Guest Editor
Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA
Interests: polymer dielectrics; polymer nanocomposites; functional polymers; energy storage and conversion; flexible electronics

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Guest Editor
School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Interests: polymer dielectrics; polymer nanocomposites; solid electrolyte for lithium ion battery; flexible electronics
Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Interests: polymer dielectrics; polymer nanocomposites; energy storage and conversion; energy harvesting

Special Issue Information

Dear Colleagues,

In the mid-20th century, people began to replace paper sheets with polymers in film capacitors, and that is when the plastic film capacitor came to be known. Since then, research interests and activities themed on polymer dielectrics, conforming to the industrial demand for plastic film capacitors, have been increasing rapidly. By the end of 2015, plastic film capacitors have claimed a ca. 50% share of the total global consumption value for all sorts of capacitors.

As a call to the growing need for high energy density film capacitors in energy storage and pulsed power applications, collective efforts have been put into developing high energy density polymer dielectrics. These include new chemical synthesis, advanced film processing, topological-structure engineering, multi-scale hybridization and combination with inorganic moieties, etc. Truly, a continued progress has been made over the past decade, and up to date the energy density of polymer dielectrics has been improved significantly. Another emerging research area under the theme of polymer dielectrics is motivated by the demand for high temperature film capacitors in, for example, hybrid electric vehicle and aerospace power conditioning applications. The main strategy in this area has been the development of polymer dielectrics with high thermal stability by means of molecular design and modification, and very recently the research is advancing into a new stage where suppression of high temperature conduction and thermal runaway inherent to polymer dielectrics becomes a central issue to be dealt with.

In this Special Issue, to continue advancing this interdisciplinary field, we are calling for original papers on the design, synthesis, characterization and simulation of polymer-based dielectrics ranging from material chemistry, to processing and characterization techniques, and to computations of dielectric performance. We also welcome review papers with opinionated and inspiring perspectives that may help to open new possibilities for polymer dielectrics toward the applications cited above.

Prof. Qing Wang
Prof. Yang Shen
Dr. Qi Li
Guest Editors

Manuscript Submission Information

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Keywords

  • polymers
  • dielectrics
  • polymer nanocomposites
  • energy storage
  • film capacitors

Published Papers (3 papers)

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Research

1782 KiB  
Article
Effect of Polymer Matrix on the Structure and Electric Properties of Piezoelectric Lead Zirconatetitanate/Polymer Composites
by Rui Li, Jun Zhou, Hujun Liu and Jianzhong Pei
Materials 2017, 10(8), 945; https://doi.org/10.3390/ma10080945 - 14 Aug 2017
Cited by 27 | Viewed by 4487
Abstract
Piezoelectric lead zirconatetitanate (PZT)/polymer composites were prepared by two typical polymer matrixes using the hot-press method. The micromorphology, microstructure, dielectric properties, and piezoelectric properties of the PZT/polymer composites were characterized and investigated. The results showed that when the condition of frequency is 10 [...] Read more.
Piezoelectric lead zirconatetitanate (PZT)/polymer composites were prepared by two typical polymer matrixes using the hot-press method. The micromorphology, microstructure, dielectric properties, and piezoelectric properties of the PZT/polymer composites were characterized and investigated. The results showed that when the condition of frequency is 103 Hz, the dielectric and piezoelectric properties of PZT/poly(vinylidene fluoride) were both better than that of PZT/polyvinyl chloride (PVC). When the volume fraction of PZT was 50%, PZT/PVDF prepared by the hot-press method had better comprehensive electric property. Full article
(This article belongs to the Special Issue Polymers for Film Capacitors)
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3039 KiB  
Article
Influences of Thermal Treatment on the Dielectric Performances of Polystyrene Composites Reinforced by Graphene Nanoplatelets
by Benhui Fan, Yu Liu, Delong He and Jinbo Bai
Materials 2017, 10(7), 838; https://doi.org/10.3390/ma10070838 - 21 Jul 2017
Cited by 11 | Viewed by 3883
Abstract
Dielectric properties of composites near percolation threshold (fc) are often sensitive to thermal treatments, and the annealing temperature is usually associated with a polymer’s rheological properties. In this study, the influences of the thermal treatment on dielectric properties are investigated [...] Read more.
Dielectric properties of composites near percolation threshold (fc) are often sensitive to thermal treatments, and the annealing temperature is usually associated with a polymer’s rheological properties. In this study, the influences of the thermal treatment on dielectric properties are investigated for the polystyrene (PS) matrix composite reinforced by graphene nanoplatelets (GNP) fillers near fc. It can be found that the thermal treatment can not only increase the dielectric constant, but also decrease the dielectric loss for the PS/GNP composite. This interesting phenomenon possibly happens in the interfacial region of PS/GNP with the thickness about 4–6 nm according to the electron energy-loss spectroscopy (EELS) results. The free volumes around the interface can be easily altered by the movement of polymeric segments after annealing at the glass transition temperature. Full article
(This article belongs to the Special Issue Polymers for Film Capacitors)
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3852 KiB  
Article
Carbon Coated Boron Nitride Nanosheets for Polymer Nanocomposites with Enhanced Dielectric Performance
by Minhao Yang, Hang Zhao, Delong He, Chaohe Hu, Haowei Chen and Jinbo Bai
Materials 2017, 10(7), 741; https://doi.org/10.3390/ma10070741 - 03 Jul 2017
Cited by 6 | Viewed by 4589
Abstract
Carbon coated boron nitride nanosheets (BNNSs@C) hybrids with different carbon contents were synthesized by a chemical vapor deposition (CVD) method. The content of carbon in as-obtained BNNSs@C hybrids could be precisely adjusted from 2.50% to 22.62% by controlling the carbon deposition time during [...] Read more.
Carbon coated boron nitride nanosheets (BNNSs@C) hybrids with different carbon contents were synthesized by a chemical vapor deposition (CVD) method. The content of carbon in as-obtained BNNSs@C hybrids could be precisely adjusted from 2.50% to 22.62% by controlling the carbon deposition time during the CVD procedure. Afterward, the BNNSs@C hybrids were subsequently incorporated into the polyvinylidene fluoride (PVDF) matrix to fabricate the BNNSs@C/PVDF nanocomposites through a combination of solution and melting blending methods. The dielectric properties of the as-obtained BNNSs@C/PVDF nanocomposites could be accurately tuned by adjusting the carbon content. The resultant nanocomposites could afford a high dielectric constant about 39 (103 Hz) at BNNSs@C hybrids loading of 30 vol %, which is 4.8 times larger than that of pristine BNNSs-filled ones at the same filler loading, and 3.5 times higher than that of pure PVDF matrix. The largely enhanced dielectric performance could be ascribed to the improved interfacial polarizations of BNNSs/carbon and carbon/PVDF interfaces. The approach reported here offers an effective and alternative method to fabricate high-performance dielectric nanocomposites, which could be potentially applied to the embedded capacitors with high dielectric performance. Full article
(This article belongs to the Special Issue Polymers for Film Capacitors)
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