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<p>The present study demonstrates the preparation of biochar@Bi<sub>2</sub>O<sub>3</sub> nanocomposites using facile chemical synthesis route to obtain an efficient and environmentally friendly electrode material for supercapacitors. The physicochemical properties of the prepared nanomaterials were investigated using various analytical techniques, namely Powder-XRD, FTIR, Raman, FESEM/EDAX, XPS, and BET. These characterization results reveal that the prepared biochar@Bi<sub>2</sub>O<sub>3</sub> nanocomposites exhibit cubic crystalline characteristics, compact surface morphology, multiple valence states, and a large surface area. Furthermore, the electrochemical performance of the fabricated electrode materials were examined through different electrochemical characterization techniques such as cyclic voltammetry, galvanostatic charge discharge and electrochemical impedance spectroscopy. In that, the biochar@Bi<sub>2</sub>O<sub>3</sub> electrode exhibited the specific capacitance of 3136 Fg<sup>−1</sup> at the current density of 1 Ag<sup>−1</sup>. In addition, the fabricated biochar-Bi<sub>2</sub>O<sub>3</sub> delivers the good capacitive retention and lower impedance value. From these electrochemical results, it is inferred that the fabricated biochar@Bi<sub>2</sub>O<sub>3</sub> electrode can be efficiently used for next-generation green energy storage applications.</p>

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Synergistic biochar/Bi2O3 nanocomposites for high-performance supercapacitor applications

  • 期刊论文

  • 发表日期：

    2026年7月20日

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  • Sivasakthi Govindhasamy,
  • Ramesh Rajendran,
  • Priyanka Elumalai,
  • Balaji Chettiannan,
  • Agilan Perumal,
  • Vairamuthu Raj,
  • Madhappan Dhivya

摘要

The present study demonstrates the preparation of biochar@Bi2O3 nanocomposites using facile chemical synthesis route to obtain an efficient and environmentally friendly electrode material for supercapacitors. The physicochemical properties of the prepared nanomaterials were investigated using various analytical techniques, namely Powder-XRD, FTIR, Raman, FESEM/EDAX, XPS, and BET. These characterization results reveal that the prepared biochar@Bi2O3 nanocomposites exhibit cubic crystalline characteristics, compact surface morphology, multiple valence states, and a large surface area. Furthermore, the electrochemical performance of the fabricated electrode materials were examined through different electrochemical characterization techniques such as cyclic voltammetry, galvanostatic charge discharge and electrochemical impedance spectroscopy. In that, the biochar@Bi2O3 electrode exhibited the specific capacitance of 3136 Fg−1 at the current density of 1 Ag−1. In addition, the fabricated biochar-Bi2O3 delivers the good capacitive retention and lower impedance value. From these electrochemical results, it is inferred that the fabricated biochar@Bi2O3 electrode can be efficiently used for next-generation green energy storage applications.