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<p>The electrochemical properties of lithium-rich layered transition metal oxide cathodes are profoundly affected by different kinds of material modifications, including elemental doping and compositing. This research endeavors to elucidate the synergistic impact of Fe doping along with graphene compositing on the structural and electrochemical characteristics of 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> (LMNC) cathodes. Four distinct cathodic materials were synthesized utilizing the sol–gel method, which are pristine LMNC and the ones doped with the Fe dopant (0.075%) composited with graphene, and included with both the Fe dopant and graphene. Structural characterization tests substantiated the presence of the layered α-NaFeO<sub>2</sub> structure and revealed the maintenance of structural stability of the cathode consequent to doping and compositing processes. Electrochemical analyses exhibited that the incorporation of the Fe dopant and graphene significantly enhanced electronic conductivity, diminished polarization effects, and facilitated lithium-ion diffusion. Among all the characterized samples, the best electrochemical performances appeared for the LMNC cathode doped with Fe and composited with graphene. The discharge capacity and coulombic efficiency of the aforementioned sample reached 379.1 mAh g<sup>−1</sup> and &gt; 94.1%, respectively. The excellent electrochemical performance of the LMNC cathode with both Fe and graphene was due to the doping and compositing processes, which could make it a potential candidate for high-performance lithium-ion batteries.</p>

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The combined effect of graphene compositing and Fe doping on electrochemical performance of lithium-rich layered LMNC as the cathode material

  • 期刊论文

  • 发表日期：

    2025年10月9日

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  • Abdullah Jalil Khazaal,
  • Boshra Ghanbari Shohany,
  • Ali Ben Ahmed

摘要

The electrochemical properties of lithium-rich layered transition metal oxide cathodes are profoundly affected by different kinds of material modifications, including elemental doping and compositing. This research endeavors to elucidate the synergistic impact of Fe doping along with graphene compositing on the structural and electrochemical characteristics of Li[Li0.20Mn0.54Ni0.13Co0.13]O2 (LMNC) cathodes. Four distinct cathodic materials were synthesized utilizing the sol–gel method, which are pristine LMNC and the ones doped with the Fe dopant (0.075%) composited with graphene, and included with both the Fe dopant and graphene. Structural characterization tests substantiated the presence of the layered α-NaFeO2 structure and revealed the maintenance of structural stability of the cathode consequent to doping and compositing processes. Electrochemical analyses exhibited that the incorporation of the Fe dopant and graphene significantly enhanced electronic conductivity, diminished polarization effects, and facilitated lithium-ion diffusion. Among all the characterized samples, the best electrochemical performances appeared for the LMNC cathode doped with Fe and composited with graphene. The discharge capacity and coulombic efficiency of the aforementioned sample reached 379.1 mAh g−1 and > 94.1%, respectively. The excellent electrochemical performance of the LMNC cathode with both Fe and graphene was due to the doping and compositing processes, which could make it a potential candidate for high-performance lithium-ion batteries.