Nonlinear dielectric thin films for high-power electric storage with energy density comparable with electrochemical supercapacitors
Mirshekarloo, Meysam Sharifzadeh
Tay, Francis Eng Hock
Date of Issue2011
School of Materials Science and Engineering
Although batteries possess high energy storage density, their output power is limited by the slow movement of charge carriers, and thus capacitors are often required to deliver high power output. Dielectric capacitors have high power density with fast discharge rate, but their energy density is typically much lower than electrochemical supercapacitors. Increasing the energy density of dielectric materials is highly desired to extend their applications in many emerging power system applications. In this paper, we review the mechanisms and major characteristics of electric energy storage with electrochemical supercapacitors and dielectric capacitors. Three types of in-house-produced ferroic nonlinear dielectric thin film materials with high energy density are described, including (Pb0.97La0.02)(Zr0.90Sn0.05Ti0.05)O3 (PLZST) antiferroelectric ceramic thin films, Pb(Zn1/3Nb2/3)O3-Pb(Mg1/3Nb2/3) O3-PbTiO3 (PZN-PMN-PT) relaxor ferroelectric ceramic thin films, and poly(vinylidene fluoride) (PVDF)-based polymer blend thin films. The results showed that these thin film materials are promising for electric storage with outstandingly high power density and fairly high energy density, comparable with electrochemical supercapacitors.
Transactions on Ultrasonics, Ferroelectrics and Frequency Control
© 2011 IEEE. This is the author created version of a work that has been peer reviewed and accepted for publication by Transactions on Ultrasonics, Ferroelectrics and Frequency Control, IEEE. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1109/TUFFC.2011.2039].