NDLI: “Grafting to”D route to high-k and low-loss PS@BaTiO nanocomposites for energy storage applications

Content Provider	IEEE Xplore Digital Library
Author	Xingyi Huang Ke Yang Pingkai Jiang
Copyright Year	2015
Description	Author affiliation: Dept. of Polymer Sci. & Eng., Shanghai Jiao Tong Univ., Shanghai, China (Xingyi Huang; Ke Yang; Pingkai Jiang)
Abstract	$Polystyrene@BaTiO_{3}$ (PS@BT) nanomposites with high dielectric constant and low dielectric loss were prepared by using the grafting to strategy. In this method, PS macromolecules with different molecular weights were first prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization and then the PS macromolecules were grafted onto the surfaces of BT nanoparticles by using a so-called thiolene click reaction. Transmission electron microscopy (TEM) was used to confirm the successful fabrication of the core-shell structured PS@BT nanocomposites. Frequency dependent dielectric constant and dielectric loss tangent were measured at room temperature by a broadband dielectric spectroscopy. The room temperature electric displacement-electric field (D-E) loops were measured by a ferroelectric polarization tester and the power energy storage of the nanocomposites was calculated accordingly. Our results showed that, regardless of the molecular weight, all the nanocomposites exhibit significantly enhanced dielectric constant but low dielectric loss tangent. In addition, it is found that the molecular weight of the polymer chains play an important role in determining the dielectric loss tangent of the nanocomposites, particularly at low frequencies, whereas only resulting in marginal difference in dielectric constant and energy density of the nanocomposites. Compared with other methods such as the “grafting from” route, the unique feature of this approach is that we can control the molecular weight of the polymer shell (i.e., polymer matrix) and tune the dielectric loss by tailoring the molecular weight of the polymer shell.
Starting Page	276
Ending Page	279
File Size	909344
Page Count	4
File Format	PDF
ISSN	21609241
e-ISBN	9781479989034
DOI	10.1109/ICPADM.2015.7295262
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-07-19
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Nanocomposites Polymers Dielectric losses Nanoparticles Dielectric constant Energy storage energy density Polystyrene BaTiO3 dielectric constant dielectric loss tangent
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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