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<p>In order to meet the power supply needs of super micro electronic sensors such as portable electronic equipment and flexible energy storage, it is significant to develop flexible supercapacitors with low-cost, high-energy density and power density. The transition metal oxides of ZnCo<sub>2</sub>O<sub>4</sub> and Fe<sub>2</sub>O<sub>3</sub> with the characteristics of wide source of raw materials and rich valence states are researched. They have lower resistance and richer active sites than single metal oxides. In our work, two materials are synthesized using the in situ hydrothermal method, and the morphology of the electrode material is controlled according to different reaction conditions. The ZnCo<sub>2</sub>O<sub>4</sub>-6/CC with the nanowire and nanosheet morphology and Fe<sub>2</sub>O<sub>3</sub>-b/CC with wire-ball-shaped exhibit excellent electrochemical performance. The fabricated flexible supercapacitor, utilizing ZnCo<sub>2</sub>O<sub>4</sub>-6/CC as the positive electrode and Fe<sub>2</sub>O<sub>3</sub>-b/CC as the negative electrode, exhibits a specific discharge capacity of 198.9 C g<sup>−1</sup> at a current density of 1 A g<sup>−1</sup>. Additionally, this device achieves a peak energy density of 46.9 Wh kg⁻<sup>1</sup> along with an outstanding power density of 8500 W kg<sup>−1</sup>.</p>

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Design and morphological control of both ZnCo2O4 and Fe2O3 electrodes and their application in flexible supercapacitors with high power density

  • 期刊论文

  • 发表日期：

    2025年6月19日

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  • Hongyu Zhang,
  • Fengying Zhang,
  • Xiaojian Li,
  • Wenzhuo Yang,
  • Rui Zeng,
  • Jialu Huang,
  • Zhehan Tu,
  • Jiahan Yang,
  • Lingzhu Gong,
  • Xue Bai

摘要

In order to meet the power supply needs of super micro electronic sensors such as portable electronic equipment and flexible energy storage, it is significant to develop flexible supercapacitors with low-cost, high-energy density and power density. The transition metal oxides of ZnCo2O4 and Fe2O3 with the characteristics of wide source of raw materials and rich valence states are researched. They have lower resistance and richer active sites than single metal oxides. In our work, two materials are synthesized using the in situ hydrothermal method, and the morphology of the electrode material is controlled according to different reaction conditions. The ZnCo2O4-6/CC with the nanowire and nanosheet morphology and Fe2O3-b/CC with wire-ball-shaped exhibit excellent electrochemical performance. The fabricated flexible supercapacitor, utilizing ZnCo2O4-6/CC as the positive electrode and Fe2O3-b/CC as the negative electrode, exhibits a specific discharge capacity of 198.9 C g−1 at a current density of 1 A g−1. Additionally, this device achieves a peak energy density of 46.9 Wh kg⁻1 along with an outstanding power density of 8500 W kg−1.