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<p>In this study, a supercapacitor electrode material with high surface area was produced by using co-precipitation and hydrothermal methods together. Produced Co<sub>0.5</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> was characterized by XRD, FTIR, SEM-mapping, and BET analyses. The BET surface area value reached a high value of 62.57&#xa0;m²/g. In electrochemical tests performed in a three-electrode system, at a scan rate of 5 mV/s, the areal capacitance and specific capacitance of the Co<sub>0.5</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub>/CB electrode were determined as 239 mF/cm<sup>2</sup> and 59.75&#xa0;F/g, respectively. The produced coin-cell type ASC (Co<sub>0.5</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub>/CB//G) showed an areal capacitance value of 66 mF/cm<sup>2</sup> at a scan rate of 5 mV/s. The energy and power density values of ASC device ​​at current density of 0.25&#xa0;mA/cm<sup>2</sup> were calculated as 11.3 uWh/cm<sup>2</sup> and 183 uW/cm<sup>2</sup>. Furthermore, the energy density value at a power density of 45.5&#xa0;W/kg was determined as 2.82 Wh/kg for cathode electrode in the ASC device. After 10,000 cycles the capacitance retention exceeded its initial capacitance due to activation effects.</p>

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Supercapacitor electrode application of Co0.5Zn0.5Fe2O4 synthesized by Hydrothermal-assisted Co-precipitation method

  • 期刊论文

  • 发表日期：

    2026年1月27日

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  • Sezgin Yasa

摘要

In this study, a supercapacitor electrode material with high surface area was produced by using co-precipitation and hydrothermal methods together. Produced Co0.5Zn0.5Fe2O4 was characterized by XRD, FTIR, SEM-mapping, and BET analyses. The BET surface area value reached a high value of 62.57 m²/g. In electrochemical tests performed in a three-electrode system, at a scan rate of 5 mV/s, the areal capacitance and specific capacitance of the Co0.5Zn0.5Fe2O4/CB electrode were determined as 239 mF/cm2 and 59.75 F/g, respectively. The produced coin-cell type ASC (Co0.5Zn0.5Fe2O4/CB//G) showed an areal capacitance value of 66 mF/cm2 at a scan rate of 5 mV/s. The energy and power density values of ASC device ​​at current density of 0.25 mA/cm2 were calculated as 11.3 uWh/cm2 and 183 uW/cm2. Furthermore, the energy density value at a power density of 45.5 W/kg was determined as 2.82 Wh/kg for cathode electrode in the ASC device. After 10,000 cycles the capacitance retention exceeded its initial capacitance due to activation effects.