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Special Issue "Polymers for Film Capacitors"

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

Deadline for manuscript submissions: closed (30 September 2017)

Special Issue Editors

Guest Editor
Prof. Qing Wang

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

School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
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Interests: polymer dielectrics; polymer nanocomposites; solid electrolyte for lithium ion battery; flexible electronics
Guest Editor
Prof. Qi Li

Department of Electrical Engineering, Tsinghua University, Beijing, 100084, China
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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

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1500 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

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

Published Papers (3 papers)

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Research

Open AccessArticle Effect of Polymer Matrix on the Structure and Electric Properties of Piezoelectric Lead Zirconatetitanate/Polymer Composites
Materials 2017, 10(8), 945; doi:10.3390/ma10080945
Received: 27 June 2017 / Revised: 7 August 2017 / Accepted: 8 August 2017 / Published: 14 August 2017
Cited by 1 | PDF Full-text (1782 KB) | HTML Full-text | XML Full-text
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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Open AccessFeature PaperArticle Influences of Thermal Treatment on the Dielectric Performances of Polystyrene Composites Reinforced by Graphene Nanoplatelets
Materials 2017, 10(7), 838; doi:10.3390/ma10070838
Received: 27 June 2017 / Revised: 14 July 2017 / Accepted: 18 July 2017 / Published: 21 July 2017
PDF Full-text (3039 KB) | HTML Full-text | XML Full-text
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
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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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Open AccessFeature PaperArticle Carbon Coated Boron Nitride Nanosheets for Polymer Nanocomposites with Enhanced Dielectric Performance
Materials 2017, 10(7), 741; doi:10.3390/ma10070741
Received: 15 June 2017 / Revised: 29 June 2017 / Accepted: 30 June 2017 / Published: 3 July 2017
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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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