Electrochemical performance of polyaniline/ZnO composite and bilayer electrodes for high-power supercapacitors

BULGURCUOĞLU A. E.

International Journal of Global Warming, vol.38, no.3, pp.288-301, 2026 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 38 Issue: 3
  • Publication Date: 2026
  • Doi Number: 10.1504/ijgw.2026.152342
  • Journal Name: International Journal of Global Warming
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, INSPEC
  • Page Numbers: pp.288-301
  • Keywords: bilayer, PANI, polyaniline, supercapacitor, zinc oxide, ZnO
  • Yıldız Technical University Affiliated: Yes

Abstract

This study investigates the electrochemical performance of polyaniline (PANI), zinc oxide (ZnO), and their bilayer and composite electrodes for supercapacitors. Cyclic voltammetry, galvanostatic charge-discharge, and Ragone plot analyses were used to evaluate energy and power characteristics. PANI exhibits high energy density but limited stability, while ZnO maintains performance at high power densities. The PANI/ZnO bilayer shows moderate improvement; however, the PANI/ZnO composite achieves the highest energy density of 6.39 Wh kg-1 at 0.27 W kg-1 and retains nearly 100% capacitance after 1,500 cycles, demonstrating superior stability and efficiency.