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<p>The solid-state lithium battery is widely regarded as one of the most promising options for future energy storage systems. However, one significant challenge facing this type of battery is enhancing the ionic and electronic conductivities of the sintered composite cathode material as an active material. In this study, we investigated the ionic and electronic conductivities of a LiNi<sub>0.7</sub>Mn<sub>0.15</sub>Co<sub>0.15</sub>O<sub>2</sub> compound that underwent dual modification through Al-doping and V<sub>2</sub>O<sub>5</sub> coating, using AC impedance measurements. The ionic and electronic resistances were statistically analyzed via the Taguchi method, employing an experimental design focused on assessing the impact of these dual modifications on resistance reduction. An L8 orthogonal array was created, with Al-doping and V<sub>2</sub>O<sub>5</sub> coating as factors, each with two levels: unmodified and modified. Each experiment was duplicated. The results, interpreted based on the calculated signal-to-noise ratio and confirmed by analysis of variance (ANOVA), demonstrated that dual modification has a statistically significant effect in reducing both ionic and electronic resistance. A significant increase in ionic and electronic conductivities was observed when the material was modified with Al-doping and V<sub>2</sub>O<sub>5</sub> coating.</p>

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Impedance spectroscopy analysis of an Al-doped LiNi0.7Mn0.15Co0.15O2 solid-state cathode material coated with V2O5

  • 期刊论文

  • 发表日期：

    2025年7月16日

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  • O. Cárdenas-Caldera,
  • J. Herrera Robles,
  • G. Herrera-Pérez,
  • P. G. Mani-Gonzalez,
  • H. Camacho-Montes

摘要

The solid-state lithium battery is widely regarded as one of the most promising options for future energy storage systems. However, one significant challenge facing this type of battery is enhancing the ionic and electronic conductivities of the sintered composite cathode material as an active material. In this study, we investigated the ionic and electronic conductivities of a LiNi0.7Mn0.15Co0.15O2 compound that underwent dual modification through Al-doping and V2O5 coating, using AC impedance measurements. The ionic and electronic resistances were statistically analyzed via the Taguchi method, employing an experimental design focused on assessing the impact of these dual modifications on resistance reduction. An L8 orthogonal array was created, with Al-doping and V2O5 coating as factors, each with two levels: unmodified and modified. Each experiment was duplicated. The results, interpreted based on the calculated signal-to-noise ratio and confirmed by analysis of variance (ANOVA), demonstrated that dual modification has a statistically significant effect in reducing both ionic and electronic resistance. A significant increase in ionic and electronic conductivities was observed when the material was modified with Al-doping and V2O5 coating.