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<p>This study successfully optimized the crystal structure and electronic properties of manganese chromium oxide (MnCr<sub>2</sub>O<sub>4</sub>) through a vanadium doping strategy, producing V-doped MnCr<sub>2</sub>O<sub>4</sub> nanomaterials with multivalent coexistence and mesoporous structure. Systematic investigations revealed that vanadium doping significantly enhanced the pseudocapacitive performance of the material, achieving a specific capacitance of 1859&#xa0;F/g(413.1 mAh/g and 1487.2&#xa0;C/g) at 1&#xa0;A/g, while maintaining 70.3% capacity retention at a high current density of 12&#xa0;A/g, and demonstrating excellent cycling stability (86.6% capacity retention after 10,000 cycles). An asymmetric supercapacitor constructed with this material, V-MnCr<sub>2</sub>O<sub>4</sub>//CNTs (Carbon Nanotubes), achieved an energy density of 36.4 Wh/kg and a power density of 314.2&#xa0;W/kg, showing good overall energy storage performance. Through the synergistic design strategy of “doping-structure-performance,” this study provides an effective approach for developing manganese-based electrode materials that combine high specific capacitance, excellent rate capability, and long-term cycling stability, highlighting significant potential for application in efficient electrochemical energy storage systems.</p>

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Research on vanadium-regulated manganese chromium oxide electrode materials for supercapacitors

  • 期刊论文

  • 发表日期：

    2026年4月18日

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  • Chi Cheng,
  • Yunzhe Du

摘要

This study successfully optimized the crystal structure and electronic properties of manganese chromium oxide (MnCr2O4) through a vanadium doping strategy, producing V-doped MnCr2O4 nanomaterials with multivalent coexistence and mesoporous structure. Systematic investigations revealed that vanadium doping significantly enhanced the pseudocapacitive performance of the material, achieving a specific capacitance of 1859 F/g(413.1 mAh/g and 1487.2 C/g) at 1 A/g, while maintaining 70.3% capacity retention at a high current density of 12 A/g, and demonstrating excellent cycling stability (86.6% capacity retention after 10,000 cycles). An asymmetric supercapacitor constructed with this material, V-MnCr2O4//CNTs (Carbon Nanotubes), achieved an energy density of 36.4 Wh/kg and a power density of 314.2 W/kg, showing good overall energy storage performance. Through the synergistic design strategy of “doping-structure-performance,” this study provides an effective approach for developing manganese-based electrode materials that combine high specific capacitance, excellent rate capability, and long-term cycling stability, highlighting significant potential for application in efficient electrochemical energy storage systems.