Scholarlink

<p>This work reports the synthesis of manganese ferrite@biomass carbon@activated carbon (MnFe<sub>2</sub>O<sub>4</sub>@BC@AC) and manganese ferrite@biomass carbon (MnFe<sub>2</sub>O<sub>4</sub>@BC) composites using rice straw (RS) extract as a green solvothermal medium. The rice straw-derived extract serves simultaneously as a solvent and a natural reducing/chelating agent during the formation of MnFe<sub>2</sub>O<sub>4</sub>@BC, while activated carbon (AC) provides a highly porous conductive matrix. Comprehensive structural and morphological characterization confirmed the successful incorporation of MnFe<sub>2</sub>O<sub>4</sub> nanoparticles within the carbon framework. Electrochemical performance was evaluated in a three-electrode configuration using 6&#xa0;M KOH over a potential window of 0.0–0.5&#xa0;V. The MnFe<sub>2</sub>O<sub>4</sub>@BC@AC composite delivered a high specific capacity of 73.6&#xa0;mA&#xa0;h&#xa0;g<sup>-1</sup> at 1 A g<sup>-1</sup>, outperforming the pristine MnFe<sub>2</sub>O<sub>4</sub>@BC (54.2&#xa0;mA&#xa0;h&#xa0;g<sup>-1</sup>). At 10 A g<sup>-1</sup>, the composite retained 38.3% of its initial capacity, compared to 35.6% for the pristine material. These results demonstrate that integrating activated carbon significantly enhances charge transport and overall electrochemical performance, making MnFe<sub>2</sub>O<sub>4</sub>@BC@AC a promising candidate for high-performance supercapacitor electrodes.</p> Graphic Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Synthesis and electrochemical performance of MnFe2O4@BC@AC composites from rice straw for supercapacitor application

  • 期刊论文

  • 发表日期：

    2026年4月1日

查看全文
  • Papa Alpha Ndiaye,
  • El Hadji Mamour Sakho,
  • Ndeye Maty Ndiaye,
  • Makha Ndao,
  • Caroline Rosemyya Kwawu,
  • Ahmed Subrati,
  • Eduart Gutierrez-Pineda,
  • Sergio E. Moya,
  • Balla Diop Ngom

摘要

This work reports the synthesis of manganese ferrite@biomass carbon@activated carbon (MnFe2O4@BC@AC) and manganese ferrite@biomass carbon (MnFe2O4@BC) composites using rice straw (RS) extract as a green solvothermal medium. The rice straw-derived extract serves simultaneously as a solvent and a natural reducing/chelating agent during the formation of MnFe2O4@BC, while activated carbon (AC) provides a highly porous conductive matrix. Comprehensive structural and morphological characterization confirmed the successful incorporation of MnFe2O4 nanoparticles within the carbon framework. Electrochemical performance was evaluated in a three-electrode configuration using 6 M KOH over a potential window of 0.0–0.5 V. The MnFe2O4@BC@AC composite delivered a high specific capacity of 73.6 mA h g-1 at 1 A g-1, outperforming the pristine MnFe2O4@BC (54.2 mA h g-1). At 10 A g-1, the composite retained 38.3% of its initial capacity, compared to 35.6% for the pristine material. These results demonstrate that integrating activated carbon significantly enhances charge transport and overall electrochemical performance, making MnFe2O4@BC@AC a promising candidate for high-performance supercapacitor electrodes.

Graphic Abstract