Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 96, Issue 8, Pages 2519-2524Publisher
WILEY
DOI: 10.1111/jace.12338
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Funding
- National Science Foundation of China [61025002]
- National 973-project of China [2009CB623302]
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We report nanocomposites of increased dielectric permittivity, enhanced electric breakdown strength and high-energy density based on surface-modified BaTiO3 (BT) nanoparticles filled poly(vinylidene fluoride) polymer. Polyvinylprrolidone (PVP) is used as the surface modification agent and homogeneous nanocomposite films have been prepared by solution casting processing. The dielectric permittivity of the nanocomposite with treated BT is higher than those with untreated BT and reaches the maximum value of 77 (1kHz) at BT concentration of 55vol%. The electric breakdown strength of the nanocomposite is greatly enhanced to 336MV/m at BT concentration of 10vol% and the calculated energy density is 6.8J/cm(3). The results indicate that using PVP as surface modification agent can greatly enhance the dielectric permittivity and electric breakdown strength of the ceramic-polymer nanocomposite and achieve high-energy density for energy storage and power capacitor applications.
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