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<p>Transition metal oxides (TMOs), especially spinel-type iron oxides, are widely used as electrode materials for supercapacitors due to their high specific capacitance. However, as a kind of pseudocapacitive electrode material, transition metal oxide undergoes volume changes during the charge–discharge process, leading to a decrease in its cycling stability. Carbon nanotubes (CNTs), as a common carbon-based material, exhibit excellent cycling stability. In this study, we have successfully synthetized CoFe<sub>2</sub>O<sub>4</sub>@Co<sub>3</sub>O<sub>4</sub>/CNT by utilizing zeolitic imidazolate framework (ZIF) as a template. The resultant material exhibits a porous network architecture and the synthesized material was subsequently utilized as an electrode in supercapacitor applications, exhibiting a remarkable specific capacitance of 641 C g<sup>−1</sup> at 1 A g<sup>−1</sup>. The stability of the electrode were evidenced by its ability to retain 62.3% of its initial capacitance after 5000 cycles at the high current density of 10 A g<sup>−1</sup>, indicating its potential for long-term energy storage applications.</p>

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Microstructure of porous network CoFe2O4@Co3O4/CNT based on zeolitic imidazolate framework as electrode materials for supercapacitors application

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月10日

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  • Xiaojun Ding,
  • Dingbang Liu,
  • Zihao Wang,
  • Yilin Peng,
  • Shuqi Fu,
  • Na Zhan,
  • Qing Jiang,
  • Mingyang Li,
  • Haiyang Wan,
  • Jiansheng Liu,
  • Xinsheng Zhao,
  • Fei Gao,
  • Weiping Zhou,
  • Zhenzhi Cheng,
  • Zhongkai Wu,
  • Guangsheng Luo

摘要

Transition metal oxides (TMOs), especially spinel-type iron oxides, are widely used as electrode materials for supercapacitors due to their high specific capacitance. However, as a kind of pseudocapacitive electrode material, transition metal oxide undergoes volume changes during the charge–discharge process, leading to a decrease in its cycling stability. Carbon nanotubes (CNTs), as a common carbon-based material, exhibit excellent cycling stability. In this study, we have successfully synthetized CoFe2O4@Co3O4/CNT by utilizing zeolitic imidazolate framework (ZIF) as a template. The resultant material exhibits a porous network architecture and the synthesized material was subsequently utilized as an electrode in supercapacitor applications, exhibiting a remarkable specific capacitance of 641 C g−1 at 1 A g−1. The stability of the electrode were evidenced by its ability to retain 62.3% of its initial capacitance after 5000 cycles at the high current density of 10 A g−1, indicating its potential for long-term energy storage applications.