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<p>Nanometer vanadium dioxide (VO<sub>2</sub>) was prepared using a hydrothermal decomposition method. In this research, vanadium pentoxide was used as the raw material to study the effects of hydrothermal temperature (25–200°C), hydrothermal time (3–24&#xa0;h), and types of reducing agents (oxalic acid/ethanol/formaldehyde) on the morphology and electrochemical performance of nanometer VO<sub>2</sub>. The results showed that increasing the hydrothermal reaction temperature or prolonging the reaction time favored the formation of VO<sub>2</sub> nanocrystals and improved their discharge performance. Under the conditions of a hydrothermal temperature of 200°C, a reaction time of 24&#xa0;h, and using oxalic acid as the reducing agent, the resulting VO<sub>2</sub> nanoplates had a width of approximately 150–200&#xa0;nm and a thickness of 25–35&#xa0;nm. Discharge performance tests indicated that the product reduced by oxalic acid exhibited superior performance compared to the other two reducing agents, with no performance degradation after 20 cycles, demonstrating excellent cycling stability and suitability as an electrode material.</p>

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Preparation of Nano-Vanadium Dioxide by Hydrothermal Decomposition

  • 期刊论文

  • 发表日期：

    2025年4月16日

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  • Jinlong Bai,
  • Zhigan Deng,
  • Chang Wei,
  • Mingting Li,
  • Xingbin Li

摘要

Nanometer vanadium dioxide (VO2) was prepared using a hydrothermal decomposition method. In this research, vanadium pentoxide was used as the raw material to study the effects of hydrothermal temperature (25–200°C), hydrothermal time (3–24 h), and types of reducing agents (oxalic acid/ethanol/formaldehyde) on the morphology and electrochemical performance of nanometer VO2. The results showed that increasing the hydrothermal reaction temperature or prolonging the reaction time favored the formation of VO2 nanocrystals and improved their discharge performance. Under the conditions of a hydrothermal temperature of 200°C, a reaction time of 24 h, and using oxalic acid as the reducing agent, the resulting VO2 nanoplates had a width of approximately 150–200 nm and a thickness of 25–35 nm. Discharge performance tests indicated that the product reduced by oxalic acid exhibited superior performance compared to the other two reducing agents, with no performance degradation after 20 cycles, demonstrating excellent cycling stability and suitability as an electrode material.