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<p>In this study, a new type of cathode material, Li[Li<sub>0.20</sub>Mn<sub>0.54</sub>Ni<sub>0.13</sub>Co<sub>0.13</sub>]O<sub>2</sub>, was created and modified with zinc (Zn) and graphene. The goal was to understand how these modifications affect the structure, appearance, and behavior of the material. Various techniques, including X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and energy-dispersive X-ray spectroscopy (EDXS), were employed to thoroughly analyze the physical and chemical properties of the modified cathode materials. To assess their performance, the samples underwent testing such as electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and galvanostatic charge/discharge experiments. The results of our study showed that addition Zn and graphene to the cathode materials significantly improved its electrochemical performance. The sample modified with both Zn and graphene exhibited the best performance, displaying reduced resistance to charge transfer and Warburg impedance before and after cycling. It also demonstrated higher charge and discharge capacities and improved Coulombic efficiency. Incorporation of graphene and Zn facilitated the movement of lithium ions and lessened polarization caused by charge transfer resistance. Notably, co-doping with both Zn and graphene was found to be more effective than doping with each of the aforementioned dopants. These findings offer valuable insights into developing high-performance lithium-ion batteries, which could lead to advancements in energy storage technologies. Ultimately, this research may pave the way for future batteries that are not only energy-dense but also reliable, efficient, and capable of meeting the increasing demands of our technologically advanced world.</p>

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Synthesis and electrochemical characterization of lithium-rich cathode material Li[Li0.20Mn0.54Ni0.13Co0.13]O2 composited with graphene and doped with zinc

  • 期刊论文

  • 发表日期：

    2025年8月23日

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  • Baha Rabah Ahmed,
  • Ali Reyhani,
  • Mohammad Reza Khanlary,
  • Seyedeh Zahra Mortazavi

摘要

In this study, a new type of cathode material, Li[Li0.20Mn0.54Ni0.13Co0.13]O2, was created and modified with zinc (Zn) and graphene. The goal was to understand how these modifications affect the structure, appearance, and behavior of the material. Various techniques, including X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and energy-dispersive X-ray spectroscopy (EDXS), were employed to thoroughly analyze the physical and chemical properties of the modified cathode materials. To assess their performance, the samples underwent testing such as electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and galvanostatic charge/discharge experiments. The results of our study showed that addition Zn and graphene to the cathode materials significantly improved its electrochemical performance. The sample modified with both Zn and graphene exhibited the best performance, displaying reduced resistance to charge transfer and Warburg impedance before and after cycling. It also demonstrated higher charge and discharge capacities and improved Coulombic efficiency. Incorporation of graphene and Zn facilitated the movement of lithium ions and lessened polarization caused by charge transfer resistance. Notably, co-doping with both Zn and graphene was found to be more effective than doping with each of the aforementioned dopants. These findings offer valuable insights into developing high-performance lithium-ion batteries, which could lead to advancements in energy storage technologies. Ultimately, this research may pave the way for future batteries that are not only energy-dense but also reliable, efficient, and capable of meeting the increasing demands of our technologically advanced world.