Enhanced discharged energy density and efficiency of poly(vinylidene fluoride) nanocomposites through a small loading of core-shell structured BaTiO₃@Al₂O₃ nanofibers

详细信息    查看全文

• 作者：Shaohui Liu^a ; ^b ; Jiao Wang^b ; Bo Shen^a ; Jiwei Zhai^a ; ^{apzhai@tongji.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Discharged energy density ; Poly(vinylidene fluoride) nanocomposites ; Interfacial polarization ; BaTiO3@Al2O3 nanofibers ; Inorganic&ndash ; organic nanocomposite
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：585-589
• 全文大小：612 K

文摘

Nanocomposite based on poly(vinylidene fluoride) (PVDF) polymer filled with surface functionalized core-shell structure BaTiO₃@Al₂O₃ nanofibers (BT@Al₂O₃ NF) were prepared via the solution casting method. Experimental results clearly demonstrate that the nanocomposites with BT@Al₂O₃ NF exhibit enhanced discharged energy density under high electric field compared to those of BT NF. The maximum discharged energy density in the nanocomposite with 2.5 vol% BT@Al₂O₃ NF is 7.1 J/cm³ at 3800 kV/cm with an efficiency of above 65.1%. According to the results of complex impedance analysis, coating Al₂O₃ layers on the surface of BT NF reduces the Maxwell–Wagner–Sillars interfacial polarization, which might be the reason of the improvement of the discharged energy density and discharged efficiency. This work may provide an effective solution to enhance discharged energy density in polymer-based nanocomposites.