• 文献标题:   Novel MgO/few-layer graphene-filled polyaniline ternary nanocomposite as efficient electrode material in aqueous supercapacitors
  • 文献类型:   Article
  • 作  者:   BEJJANKI D, PUTTAPATI SK, PANT H, SRIKANTH VVSS
  • 作者关键词:   nanocomposite, polymeric composite, energy storage conversion
  • 出版物名称:   BULLETIN OF MATERIALS SCIENCE
  • ISSN:   0250-4707 EI 0973-7669
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1007/s12034-022-02885-0
  • 出版年:   2023

▎ 摘  要

MgO/few-layer graphene (FLG) nanocomposite is proven as an excellent electrode in aqueous supercapacitors (AS). The synergy between the pseudo-capacitive MgO and the double-layer charging nature of FLG that enhances the supercapacitors' specific capacitance (SC) was successfully tested. The SC could be further enhanced by combining MgO/FLG with a third component, such as a conducting polymer (with a Faradaic type of charge storage capability). Herein, such an attempt has been made. MgO/FLG was uniformly filled in polyaniline (PANI) by using a simple in situ polymerization method. X-ray diffraction, electron microscopy, and Raman and Fourier transform infrared spectroscopic analyses clearly showed the formation of a ternary nanocomposite constituted by MgO, FLG and PANI. As anticipated, the ternary nanocomposite (MgO/FLG-filled PANI (MFP)) exhibited an enhanced SC (compared to MgO/FLG) when tested as electrode material in AS. The MFP composite was evaluated for SC using a 3-electrode system. MFP composite exhibited a maximum SC of 347 F g(-1) when tested at a scan rate of 5 mV s(-1) using 1 M aqueous H2SO4 as the electrolyte. The electrode material assumable with symmetric capacitance achieved a maximum capacitance of 396 F g(-1) at a current density of 1 A g(-1) and showed a capacitance retention of 81%. In contrast, MgO/FLG exhibited much lower values under similar testing conditions.