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.
Keywords
Supercapacitor
Capacitance
Composite number
Polyaniline
Electrochemistry
Electrode
Power density
Materials science
Subject Areas
Supercapacitor Materials and Fabrication
·Electronic, Optical and Magnetic Materials ·Physical Sciences
Conducting polymers and applications
·Polymers and Plastics ·Physical Sciences
Advancements in Battery Materials
·Electrical and Electronic Engineering ·Physical Sciences
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