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<p>In this study, Ag<b>–</b>Bi bimetallic negative electrode was prepared on Fe foam substrate through a clean and efficient one-step microwave route. The synergistic effect of Ag, Bi, and Fe endowed the electrode with a remarkable electrochemical performance. The electrode attained an impressive areal capacitance of 5.24&#xa0;F cm<sup>−2</sup> at 1&#xa0;mA cm<sup>−2</sup> in 6&#xa0;M KOH. Notably, the capacitance dropped to 76% of its original capacitance after undergoing 10,000 charge-discharge cycles at 10&#xa0;mA cm<sup>−2</sup>, which indicates good stability and reliability. Furthermore, an asymmetric supercapacitor was designed and built using Ag–Bi/iron foam as the positive electrode. The device maintained an 85.3% initial capacitance through 12,000 charge-discharge cycles, while delivering good areal energy/power density (643.56 µWh cm<sup>−2</sup>/1266.63 µW cm<sup>−2</sup>). This study established a fabrication strategy for high-performance anode materials, achieved an excellent balance between electrochemical efficiency and economic viability, and demonstrated substantial potential for practical application.</p>

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Microwave synthesis of iron foam self-supported Ag–Bi bimetallic for supercapacitor anode materials

  • 期刊论文

  • 发表日期：

    2025年10月31日

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  • Shuangyi He,
  • Zihao Wang,
  • Shuai Zhang,
  • Weiwei Zhao,
  • Jujie Luo

摘要

In this study, Ag–Bi bimetallic negative electrode was prepared on Fe foam substrate through a clean and efficient one-step microwave route. The synergistic effect of Ag, Bi, and Fe endowed the electrode with a remarkable electrochemical performance. The electrode attained an impressive areal capacitance of 5.24 F cm−2 at 1 mA cm−2 in 6 M KOH. Notably, the capacitance dropped to 76% of its original capacitance after undergoing 10,000 charge-discharge cycles at 10 mA cm−2, which indicates good stability and reliability. Furthermore, an asymmetric supercapacitor was designed and built using Ag–Bi/iron foam as the positive electrode. The device maintained an 85.3% initial capacitance through 12,000 charge-discharge cycles, while delivering good areal energy/power density (643.56 µWh cm−2/1266.63 µW cm−2). This study established a fabrication strategy for high-performance anode materials, achieved an excellent balance between electrochemical efficiency and economic viability, and demonstrated substantial potential for practical application.