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Warsi, M. Farooq
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article
Electrochemical characterization and structural analysis of (In2O3)/(Fe2O3) nanocomposites for high-performance supercapacitors
Abstract
<p>This study presents a comprehensive investigation of the electrochemical characteristics and structural properties of novel nanocomposites with varying compositions of (In<sub>2</sub>O<sub>3</sub>)<sub>x</sub>/(Fe<sub>2</sub>O<sub>3</sub>)<sub>1-x</sub>, where x ranges from 1 to 0. These nanocomposites were synthesized using a versatile and cost-effective co-precipitation method. The crystallographic structure and morphology of the synthesized samples were thoroughly analyzed using Powder X-ray diffraction (PXRD) and Tunneling Electron Microscopy (TEM). Advanced analytical techniques were employed including Positron Annihilation Lifetime Spectroscopy (PALS) and Coincidence Doppler Broadening Spectroscopy (CDBS) to uncover critical insights into the structural and molecular properties of these nanocomposites. PALS analysis revealed valuable insights into the pore characteristics of the nanocomposites, while CDBS identified crucial molecular interactions within the materials. Electrochemical characterization of the nanocomposites is carried out using cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical-impedance-spectroscopy (EIS) measurements. The (In<sub>2</sub>O<sub>3</sub>)<sub>0.3</sub>/(Fe<sub>2</sub>O<sub>3</sub>)<sub>0.7</sub> nanocomposite exhibits a remarkable specific capacitance of 945 F g<sup>-1</sup> at 1 A g<sup>-1</sup> and exceptional rate performance, retaining 93.6% of its specific capacitance at a six-fold higher current density. Moreover, this nanocomposite electrode demonstrates outstanding cyclic stability, maintaining 92.1% of its specific capacitance even after 3000 GCD cycles at 8 A g<sup>-1</sup>. These findings suggest that the novel composition and integrated electrochemical properties of the (In<sub>2</sub>O<sub>3</sub>)<sub>0.3</sub>/(Fe<sub>2</sub>O<sub>3</sub>)<sub>0.7</sub> nanocomposite hold great promise for enhancing the performance of next-generation electrochemical capacitors. This research contributes valuable insights into the design and development of advanced energy storage materials with applications in various high-performance energy storage devices.</p>