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<p>In this study, MgMoV₂O₆ (MMoV) and MgMoV₂O₆/MnO₂ (MMoMV) nanocomposites were synthesized by sol–gel combustion method. XRD analysis confirmed the formation of pure form of crystallized phases, with no secondary impurities. The peaks observed at 28.6° and 56.7° indexed to the planes (110) and (220) (JCPDS Card no. 81–2261) affirms the presence of MnO<sub>2</sub> in the matrix. SEM analysis revealed that addition of MnO₂ resulted in a more porous, plate-like morphology, which is favourable for ion diffusion. The presence of small grains and interconnected porous networks indicates better electrochemical kinetics and faster Mg<sup>2</sup>⁺ ion transport. UV–Vis spectroscopy revealed that MMoMV exhibited a slight narrowing lower optical band gap, and higher optical conductivity, with a prominent peak around 6&#xa0;eV. Cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) studies demonstrated that MMoMV exhibited good specific capacity, better rate performance and improved stability compared to MMoV. This indicates good rate capability and fast charge transfer mechanism of electrode material. Additionally, Ragone plot illustrated that MMoMV achieved a good balance between energy and power density. Hence MMoMV electrode exhibit a maximum energy density of 35mWh/kg at a power density of 500mW/kg making it a promising candidate for advanced battery and hybrid energy storage systems. These findings highlight the significance of structural and optical modifications in improving the electrochemical suitability of MMoV-based materials, making MMoMV a promising candidate for advanced magnesium battery applications. Adding to this benefit, MnO<sub>2</sub> doping enhances electrical conductivity, structural stability and redox activity of MgMoV<sub>2</sub>O<sub>6</sub> leading to noteworthy charge–discharge performance. Hence MnO<sub>2</sub>/MgMoV<sub>2</sub>O<sub>6</sub> nanocomposites are targeted as sophisticated cathode materials that can pave way to durable, efficient and eco-friendly energy storage system.</p>

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Preparation of an MgMoV2O6/MnO2 nanocomposite as a cathode for magnesium-ion batteries

  • 期刊论文

  • 发表日期：

    2026年3月11日

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  • D. Sher Meena,
  • S. Anna Venus,
  • S. Jeya Lakshmi,
  • D. Catherine Denisha,
  • B. Delphine,
  • Manikandan Ayyar,
  • Saravanan Rajendran,
  • S. Santhoshkumar

摘要

In this study, MgMoV₂O₆ (MMoV) and MgMoV₂O₆/MnO₂ (MMoMV) nanocomposites were synthesized by sol–gel combustion method. XRD analysis confirmed the formation of pure form of crystallized phases, with no secondary impurities. The peaks observed at 28.6° and 56.7° indexed to the planes (110) and (220) (JCPDS Card no. 81–2261) affirms the presence of MnO2 in the matrix. SEM analysis revealed that addition of MnO₂ resulted in a more porous, plate-like morphology, which is favourable for ion diffusion. The presence of small grains and interconnected porous networks indicates better electrochemical kinetics and faster Mg2⁺ ion transport. UV–Vis spectroscopy revealed that MMoMV exhibited a slight narrowing lower optical band gap, and higher optical conductivity, with a prominent peak around 6 eV. Cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) studies demonstrated that MMoMV exhibited good specific capacity, better rate performance and improved stability compared to MMoV. This indicates good rate capability and fast charge transfer mechanism of electrode material. Additionally, Ragone plot illustrated that MMoMV achieved a good balance between energy and power density. Hence MMoMV electrode exhibit a maximum energy density of 35mWh/kg at a power density of 500mW/kg making it a promising candidate for advanced battery and hybrid energy storage systems. These findings highlight the significance of structural and optical modifications in improving the electrochemical suitability of MMoV-based materials, making MMoMV a promising candidate for advanced magnesium battery applications. Adding to this benefit, MnO2 doping enhances electrical conductivity, structural stability and redox activity of MgMoV2O6 leading to noteworthy charge–discharge performance. Hence MnO2/MgMoV2O6 nanocomposites are targeted as sophisticated cathode materials that can pave way to durable, efficient and eco-friendly energy storage system.