Open AccessHigh energy storage performance for dielectric film capacitors by designing 1D SrTiO3@SiO2 nanofillers
Author(s) -
Bing Xie,
Ling Zhang,
Mohsin Ali Marwat,
Yiwei Zhu,
Weigang Ma,
Pengyuan Fan,
Haibo Zhang
Publication year - 2018
Publication title -
journal of advanced dielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.38
H-Index - 13
eISSN - 2010-135X
pISSN - 2010-1368
DOI - 10.1142/s2010135x1850039x
Subject(s) - materials science , dielectric , capacitor , nanocomposite , energy storage , electric field , composite material , nanowire , film capacitor , polarization (electrochemistry) , electric displacement field , nanotechnology , optoelectronics , voltage , electrical engineering , power (physics) , physics , chemistry , quantum mechanics , piezoelectricity , engineering
The development of advanced dielectric film materials with high energy storage performance is of critical significance for pulsed power capacitor applications. Nevertheless, the low discharged energy density ([Formula: see text]) of current dielectric film material restricts their further application. In this work, core-shell structured SrTiO 3 @SiO 2 nanowires (ST@SiO 2 NWs) fillers are fabricated based on interface engineering for high [Formula: see text]. The optimized SiO 2 insulating layer could effectively confine the mobility of space charge carriers in the interfacial zone between ST NWs and thick SiO 2 insulating layer, thus reducing the interfacial polarization between the interface of nanofillers/polymer, which could be used to optimize the electric field strength and electric displacement of the corresponding nanocomposite. As a result, this nanocomposite film simultaneously exhibits enhanced maximum applied electric field ([Formula: see text]) and ([Formula: see text]-[Formula: see text]) values, thus releasing an ultrahigh discharged energy density of 14.7[Formula: see text]J/cm 3 at 390[Formula: see text]MV/m, which is 99% higher than that of the conventional ST/P(VDF-CTFE) (without SiO 2 coating) nanocomposite, and it is almost 2.5 times that of pure P(VDF-CTFE). This work demonstrates the superiority of the core-shell structured paraelectric nanowire in enhancing the energy storage performance of dielectric film capacitors, which is expected to guide the design of advanced energy-storage nanocomposites.