Title:	Super capacitive electrode performance analysis of facile synthesized α-Fe2O3 aerogel and its nanocomposite with in-situ formed polyaniline (α-Fe2O3/PANI)
Authors:	Naik, Yashwanth Venkatraman Kariduraganavar, Mahadevappa Yallappa Srinivasa, Hosapalya Thimmaiah Siddagangaiah, Palakshamurthy Bandrehalli Naik, Ramachandra
Keywords:	Cratered α-Fe2O3 aerogel Noni fruit extract In-situ chemical oxidative polymerization
Issue Date:	5-Nov-2024
Publisher:	Elsevier
Citation:	Journal of Alloys and Compounds, 2024, Vol. 1004, p175820
Abstract:	This paper presents the synthesis of an α-Fe2O3-assisted polyaniline (α-Fe2O3/PANI) nanocomposite using a straightforward two-step process. Initially, α-Fe2O3 aerogels with cratered nanohexagon structures are synthesized through a solution combustion method assisted by noni (Morinda citrifolia) fruit extract. In the second step, these nanohexagons facilitate the preparation of α-Fe2O3/PANI via in-situ chemical oxidative polymerization of anilinium chloride. The structural, optical, and morphological properties were characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy with energy-dispersive X-ray analysis (SEM-EDAX). Electrical conductivity, wettability, and electrochemical properties of the prepared materials were assessed. The results indicate that the 2D cratered α-Fe2O3 aerogel is effectively embedded within PANI, forming a modified nano α-Fe2O3/PANI composite. The composite exhibited altered DC conductivity and electrolyte wettability. After 200 cycles of cyclic voltammetry (CV), the specific capacitance of the nano α-Fe2O3/PANI was determined to be 153 Fg⁻¹ at a scan rate of 10 mVs⁻¹, retaining approximately 90 % of its cycle stability. Electrochemical impedance spectroscopy (EIS) revealed significantly lower charge transfer and equivalent series resistance values for the nano α-Fe2O3/PANI electrode compared to the pure α-Fe2O3-based electrode. Galvanostatic charge-discharge (GCD) tests further demonstrated the superior electrochemical performance of the α-Fe2O3/PANI nanocomposite electrode. Therefore, this α-Fe2O3/PANI is an advanced conducting polymeric electrode for electrochemical applications.
Description:	Restricted Access.
URI:	http://hdl.handle.net/2289/8306
Alternative Location:	https://doi.org/10.1016/j.jallcom.2024.175820
Copyright:	2024 Elsevier B.V.
Appears in Collections:	Research Papers (SCM)

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