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<p>Many researchers have focused on increasing the effectiveness of energy storage technologies in order to fulfil the world’s growing energy demand. To support this global shift toward efficient and sustainable energy solutions, alternative material synthesis strategies are gaining attention. In our present study, we compare the green way of synthesizing the CeO<sub>2</sub> nanomaterial using Centella <i>asiatica</i> powder with conventional combustion method. The CeO<sub>2</sub> nanoparticles synthesized through phyto-assisted route exhibited cerium concentration, higher surface reactivity, and well-dispersed nanostructured compared to their chemically precipitated counterparts. The electrochemical characteristics of the as-synthesized samples were investigated as supercapacitor electrode utilizing CV, GCD and EIS in both three- and two-electrode configuration. According to the three-electrode configuration GCD results, CO-II showed exceptional specific capacitance of 551.39&#xa0;F/g at 1&#xa0;A/g. The fabricated ASC device with the optimized CO-II electrode delivered a maximum gravimetric specific capacitance of 434&#xa0;F/g and specific energy of 217 Wh/Kg at 1&#xa0;A/g and maximum specific power of 11,250&#xa0;W/Kg at 10&#xa0;A/g. These results substantiate the effectiveness of dual-route synthesis as an innovative and sustainable approach for developing defect-engineering CeO<sub>2</sub> nanostructures for high-performance, energy-dense supercapacitors, offering strong potential for scalable green energy-storage technologies.</p> Graphical Abstract <p></p>

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Dual-route synthesis for cerium oxide nanoparticles for rechargeable supercapacitor applications

  • 期刊论文

  • 发表日期：

    2026年5月23日

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  • Usha Palanichamy,
  • Sivagaami Sundari Gunasekaran,
  • Priya Devarajan,
  • Ramkumar Jaganathan,
  • Sabu Michael,
  • Balaji Ramachandran,
  • Hajarabeevi Nallamohamed

摘要

Many researchers have focused on increasing the effectiveness of energy storage technologies in order to fulfil the world’s growing energy demand. To support this global shift toward efficient and sustainable energy solutions, alternative material synthesis strategies are gaining attention. In our present study, we compare the green way of synthesizing the CeO2 nanomaterial using Centella asiatica powder with conventional combustion method. The CeO2 nanoparticles synthesized through phyto-assisted route exhibited cerium concentration, higher surface reactivity, and well-dispersed nanostructured compared to their chemically precipitated counterparts. The electrochemical characteristics of the as-synthesized samples were investigated as supercapacitor electrode utilizing CV, GCD and EIS in both three- and two-electrode configuration. According to the three-electrode configuration GCD results, CO-II showed exceptional specific capacitance of 551.39 F/g at 1 A/g. The fabricated ASC device with the optimized CO-II electrode delivered a maximum gravimetric specific capacitance of 434 F/g and specific energy of 217 Wh/Kg at 1 A/g and maximum specific power of 11,250 W/Kg at 10 A/g. These results substantiate the effectiveness of dual-route synthesis as an innovative and sustainable approach for developing defect-engineering CeO2 nanostructures for high-performance, energy-dense supercapacitors, offering strong potential for scalable green energy-storage technologies.

Graphical Abstract