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<p>Stretching the lack of fossil fuels and the swell in environmental pollution have ultimately sharpened the need for sustainable energy alternatives. This work explores the energy storage performance of Bismuth Chromate Bi<sub>2</sub>CrO<sub>6</sub> (BCR) and its reduced graphene oxide/bismuth chromate (RGOBCR) composite, prepared via a one-pot hydrothermal approach. Powder X-ray Diffraction (PXRD) analysis substantiated the crystalline structure and composite nature of BCR and RGOBCR, revealing average crystallite sizes of 37&#xa0;nm and 29&#xa0;nm. High-Resolution Scanning Electron Microscopy (HRSEM) and High-Resolution Transmission Electron Microscopy (HRTEM) investigation revealed that the prepared composite retained both sheet-like and rod-like morphologies. Besides, Energy Dispersive X-ray analysis (EDAX) validated the elemental constitution of the composite, while X-ray Photoelectron Spectroscopy (XPS) provided detailed insights into the elemental configuration and oxidation states of BCR and RGOBCR samples. Electrochemical measurements, including Cyclic Voltammetry (CV) and Galvanostatic Charge-Discharge (GCD) analysis, demonstrated the pseudocapacitive behaviour of both BCR and RGOBCR. From the GCD evaluations, the specific capacitance (C<sub>sp</sub>) values were calculated as 1073&#xa0;F g<sup>− 1</sup> for BCR and 1901&#xa0;F g<sup>− 1</sup> for the RGOBCR composite in a 3&#xa0;M KOH electrolyte at a current density (C<sub>d</sub>) of 1&#xa0;A g<sup>− 1</sup>. Novel RGOBCR composite furnished excellent energy density (E<sub>d</sub>) and power density (P<sub>d</sub>) of 41 Wh kg<sup>− 1</sup> and 197&#xa0;W kg<sup>− 1</sup>, respectively. Furthermore, Electrochemical Impedance Spectroscopy (EIS) analysis of RGOBCR revealed efficient electron transport at the electrode-electrolyte boundary and reduced internal resistance. Those electrochemical studies displayed that the RGOBCR composite explores a beneficial electrode material for energy storage elements and device development.</p>

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Elucidating pseudocapacitive faradaic charge storage properties of rGO/Bi2CrO6 composite electrodes for supercapacitors

  • 期刊论文

  • 发表日期：

    2026年5月5日

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  • Kalaiselvan Ramachandran,
  • Infant Shyam Kumar Manoharan

摘要

Stretching the lack of fossil fuels and the swell in environmental pollution have ultimately sharpened the need for sustainable energy alternatives. This work explores the energy storage performance of Bismuth Chromate Bi2CrO6 (BCR) and its reduced graphene oxide/bismuth chromate (RGOBCR) composite, prepared via a one-pot hydrothermal approach. Powder X-ray Diffraction (PXRD) analysis substantiated the crystalline structure and composite nature of BCR and RGOBCR, revealing average crystallite sizes of 37 nm and 29 nm. High-Resolution Scanning Electron Microscopy (HRSEM) and High-Resolution Transmission Electron Microscopy (HRTEM) investigation revealed that the prepared composite retained both sheet-like and rod-like morphologies. Besides, Energy Dispersive X-ray analysis (EDAX) validated the elemental constitution of the composite, while X-ray Photoelectron Spectroscopy (XPS) provided detailed insights into the elemental configuration and oxidation states of BCR and RGOBCR samples. Electrochemical measurements, including Cyclic Voltammetry (CV) and Galvanostatic Charge-Discharge (GCD) analysis, demonstrated the pseudocapacitive behaviour of both BCR and RGOBCR. From the GCD evaluations, the specific capacitance (Csp) values were calculated as 1073 F g− 1 for BCR and 1901 F g− 1 for the RGOBCR composite in a 3 M KOH electrolyte at a current density (Cd) of 1 A g− 1. Novel RGOBCR composite furnished excellent energy density (Ed) and power density (Pd) of 41 Wh kg− 1 and 197 W kg− 1, respectively. Furthermore, Electrochemical Impedance Spectroscopy (EIS) analysis of RGOBCR revealed efficient electron transport at the electrode-electrolyte boundary and reduced internal resistance. Those electrochemical studies displayed that the RGOBCR composite explores a beneficial electrode material for energy storage elements and device development.