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<p>A simple and inexpensive sonication method was used in this study to synthesize two ternary hybrid aerogels, TiO₂/GO/SA and ZnO/GO/SA. All substances were characterized using energy-dispersive spectroscopy, field emission scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. The electrochemical behavior was estimated using a three-electrode system. The TiO₂/GO/SA electrode showed an excellent specific capacitance of 228 F&#xa0;g<sup>−1</sup> at a current density of 1&#xa0;mA&#xa0;g<sup>−1</sup>, with an energy density of 31 Wh&#xa0;kg<sup>−1</sup> and a power density of 498 W&#xa0;kg<sup>−1</sup>. This impressive behavior results from its high surface area and ease of electron transfer. Meanwhile, the ZnO/GO/SA electrode shows less specific capacitance of 201 F&#xa0;g<sup>−1</sup>, an energy density of 27 Wh&#xa0;kg<sup>−1</sup>, and a power density of 483 W&#xa0;kg<sup>−1</sup> as a result of ZnO volume changes during charge–discharge cycles. The two aerogel electrodes showed good coulombic efficiency, 98.5% and 99.5%, after 3400 and 2000 for charge–discharge cycles, respectively, at a current density of 5&#xa0;mA&#xa0;g<sup>−1</sup>. These results show the efficiency of the TiO<sub>2</sub>/GO/SA aerogel electrode for energy storage device applications like supercapacitors.</p>

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Study of the electrochemical activity of ternary hybrid nanocomposite aerogels: TiO2/GO/SA and ZnO/GO/SA for supercapacitors

  • 期刊论文

  • 发表日期：

    2025年3月8日

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  • Rasha Shakir Mahmood,
  • Dhia Hadi Hussain

摘要

A simple and inexpensive sonication method was used in this study to synthesize two ternary hybrid aerogels, TiO₂/GO/SA and ZnO/GO/SA. All substances were characterized using energy-dispersive spectroscopy, field emission scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. The electrochemical behavior was estimated using a three-electrode system. The TiO₂/GO/SA electrode showed an excellent specific capacitance of 228 F g−1 at a current density of 1 mA g−1, with an energy density of 31 Wh kg−1 and a power density of 498 W kg−1. This impressive behavior results from its high surface area and ease of electron transfer. Meanwhile, the ZnO/GO/SA electrode shows less specific capacitance of 201 F g−1, an energy density of 27 Wh kg−1, and a power density of 483 W kg−1 as a result of ZnO volume changes during charge–discharge cycles. The two aerogel electrodes showed good coulombic efficiency, 98.5% and 99.5%, after 3400 and 2000 for charge–discharge cycles, respectively, at a current density of 5 mA g−1. These results show the efficiency of the TiO2/GO/SA aerogel electrode for energy storage device applications like supercapacitors.