Polyaniline/MnO2/porous carbon nanofiber electrodes for supercapacitors

Dirican M., Yanilmaz M., Asiri A. M., Zhang X.

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, cilt.861, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 861
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.jelechem.2020.113995
  • Dergi Adı: JOURNAL OF ELECTROANALYTICAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chimica, Compendex, INSPEC
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

Free-standing polyaniline@MnO2@porous carbon nanofiber (PANI@MnO2@PCNF) supercapacitor electrodes were fabricated through the electrodeposition of MnO2 nanoparticles onto electrospun PCNFs and subsequent chemical polymerization of aniline on the MnO2@PCNF composite. The introduced PANI@MnO2@PCNF electrodes combined the high pseudo capacitance of both MnO2 nanoparticles and conducting PANI polymer with the good cycling stability of PCNFs, and hence they exhibited high capacitance retention (91%) after 1000 cycleswith high capacitance of 289 F/g. In order to further improve the performance, asymmetric cell configuration was employed by using PANI@MnO2@ PCNF and PCNF electrodes. Electrochemical test results showed that asymmetric cell configuration led to improved energy density (119 Wh/kg) as well as power density (322 W/kg). It is, therefore, demonstrated that binder- free PANI@MnO2@PCNF composites are promising electrode candidate for high-performance supercapacitor applications. (C) 2020 Published by Elsevier B.V.