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<p>The necessity for energy storage devices has grown significantly in number of fields in recent times. Because of its natural abundance and inherent benefits such as being environmentally friendly, spinel CuCo<sub>2</sub>O<sub>4</sub> can serve as a potential electrode material for supercapacitor. The current work focuses on synthesis of pure CuCo<sub>2</sub>O<sub>4</sub> (CC0) and Sr that has been doped with various mole concentrations of metal molecular complexes using solvents like water and citric acid by sol–gel technique. These samples are calcined for 4&#xa0;h at 600°C to obtain the fine powder of pure CuCo<sub>2</sub>O<sub>4</sub> (CC0) and Sr-doped CuCo<sub>2</sub>O<sub>4</sub> at different concentrations. To understand their chemical functionalities, structural and morphology, surface area measurements and chemical composition and oxidation states of elements, Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM), HRTEM, Brunauer–Emmett–Teller (BET) and XPS are analyzed. A maximum specific capacitance of Sr-doped 0.2&#xa0;M CuCo<sub>2</sub>O<sub>4</sub> (SCC4) electrode is&#xa0;178.06 F/g at 1 A/g, which is compared with higher than pristine CuCo<sub>2</sub>O<sub>4</sub> (80.61F/g at 1 A/g).&#xa0;The long-life cycling stability and excellent capacity retention for pure CuCo<sub>2</sub>O<sub>4</sub> (CC0) and Sr-doped 0.2&#xa0;M CuCo<sub>2</sub>O<sub>4</sub> (SCC4) electrodes are calculated. This research shows that Sr doping enhances the electrochemical properties of CuCo<sub>2</sub>O<sub>4</sub> and it is clear that Sr-doped 0.2&#xa0;M CuCo<sub>2</sub>O<sub>4</sub> (SCC4) electrode is a promising, affordable, and high-quality supercapacitor electrode material than pure CuCo<sub>2</sub>O<sub>4</sub> (CC0) electrode<sub>.</sub></p>

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Enhancing the electrochemical properties of Sr-doped spinel copper cobaltite CuCo2O4 for supercapacitor application

  • 期刊论文

  • 发表日期：

    2025年4月2日

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  • R. Amirthavalli,
  • A. Nishara Begum,
  • M. Parthibavarman,
  • M. Tamilchezhiyan

摘要

The necessity for energy storage devices has grown significantly in number of fields in recent times. Because of its natural abundance and inherent benefits such as being environmentally friendly, spinel CuCo2O4 can serve as a potential electrode material for supercapacitor. The current work focuses on synthesis of pure CuCo2O4 (CC0) and Sr that has been doped with various mole concentrations of metal molecular complexes using solvents like water and citric acid by sol–gel technique. These samples are calcined for 4 h at 600°C to obtain the fine powder of pure CuCo2O4 (CC0) and Sr-doped CuCo2O4 at different concentrations. To understand their chemical functionalities, structural and morphology, surface area measurements and chemical composition and oxidation states of elements, Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM), HRTEM, Brunauer–Emmett–Teller (BET) and XPS are analyzed. A maximum specific capacitance of Sr-doped 0.2 M CuCo2O4 (SCC4) electrode is 178.06 F/g at 1 A/g, which is compared with higher than pristine CuCo2O4 (80.61F/g at 1 A/g). The long-life cycling stability and excellent capacity retention for pure CuCo2O4 (CC0) and Sr-doped 0.2 M CuCo2O4 (SCC4) electrodes are calculated. This research shows that Sr doping enhances the electrochemical properties of CuCo2O4 and it is clear that Sr-doped 0.2 M CuCo2O4 (SCC4) electrode is a promising, affordable, and high-quality supercapacitor electrode material than pure CuCo2O4 (CC0) electrode.