Polypropylene/Polyaniline Nanofiber/Reduced Graphene Oxide Nanocomposite with Enhanced Electrical, Dielectric, and Ferroelectric Properties for a High Energy Density Capacitor

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• 作者：Sunghun Cho ; Minkyu Kim ; Jun Seop Lee ; Jyongsik Jang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：October 14, 2015
• 年：2015
• 卷：7
• 期：40
• 页码：22301-22314
• 全文大小：940K
• ISSN：1944-8252

文摘

This work demonstrates a ternary nanocomposite system, composed of polypropylene (PP), redoped PANI (r-PANI) nanofibers, and reduced graphene oxides (RGOs), for use in a high energy density capacitor. r-PANI nanofibers were fabricated by the combination methods of chemical oxidation polymerization and secondary doping processes, resulting in higher conductivity (蟽 鈮?156 S cm^鈥?) than that of the primarily doped PANI nanofibers (蟽 鈮?16 S cm^鈥?). RGO sheets with high electron mobility and thermal stability can enhance the conductivity of r-PANI/RGO (蟽 鈮?220 S cm^鈥?) and thermal stability of PP matrix. These findings could be extended to combine the advantages of r-PANI nanofibers and RGO sheets for developing an efficient means of preparing PP/r-PANI/RGO nanocomposite. When the r-PANI/RGO cofillers (10 vol %) were added to PP matrix, the resulting PP/r-PANI/RGO nanocomposite exhibited high dielectric constant (蔚鈥?鈮?51.8) with small dielectric loss (蔚鈥?鈮?9.3 脳 10^鈥?). Furthermore, the PP/r-PANI/RGO nanocomposite was used for an energy-harvesting device, which demonstrated high energy density (U_e 鈮?12.6 J cm^鈥?) and breakdown strength (E 鈮?5.86 脳 10³ kV cm^鈥?).