ORS6-0964
High-Performance Free-Standing Polyaniline Copolymer Film for Symmetric Supercapacitors
When and Where
Nov 30, -0001
12:00am - 12:00am
Presenter(s)
Salimgerey Adilov (Department of Chemistry, School of Sciences and Humanities, Nazarbayev University)
Co-Author(s)
Abstract
The advancement of flexible electronics necessitates the development of lightweight, high-capacity, and mechanically robust energy storage devices. Supercapacitors based on conducting polymers like polyaniline (PANI) are promising candidates but are conventionally limited by the need for binders and conductive additives, which increase dead mass, interrupt charge transport pathways, and accelerate structural degradation during cycling. This work presents a free-standing PANI copolymer film synthesized via a facile chemical oxidative interfacial polymerization between aniline and a custom-designed ether-bridged diamine derivative monomer. The interfacial growth mechanism yields an ultrathin (≈100 nm), binder-free, self-supporting film that functions simultaneously as active electrode material and current collector. Structural and chemical characterization by SEM, AFM, cross-sectional imaging, EDS, XPS, TGA, and four-probe conductivity measurements confirm the uniform two-dimensional morphology, high intrinsic conductivity (up to 21.38 S cm⁻¹), and remarkable chemical stability of the copolymer film over 10,000 electrochemical cycles. Electrochemical evaluation in a symmetric two-electrode coin cell with 1 M H₂SO₄ electrolyte demonstrates that the PANI copolymer film achieves a specific capacitance of 601 F g⁻¹ at 0.1 A cm⁻², an energy density of 53.4 W h kg⁻¹, and a power density of 991 W kg⁻¹ — among the highest reported for PANI-based symmetric configurations — while retaining 86% of its initial capacitance after 10,000 galvanostatic charge-discharge cycles.
