Scholarlink

<p>NiCo<sub>2</sub>O<sub>4</sub>, a relatively inexpensive transition metal double-oxide, has attracted much attention as a pseudocapacitor material. In this study, we investigated the effects of the initial pH and urea content during one-pot hydrothermal synthesis on the adhesion to the substrate and the supercapacitor properties. SEM observation revealed that the synthesis conditions influenced the crystal morphology of NiCo<sub>2</sub>O<sub>4</sub> and its adhesion to the substrate. By the N<sub>2</sub>-sorption BJH method, the peaks of pore sizes of 8 to 10&#xa0;nm became larger as the amount of urea increased. Each electrode showed a redox reaction, but the specific capacitance changed with each measurement, suggesting that the electrode structure is highly dependent on the hydrothermal coating process. The sample prepared at pH6 without urea showed a maximum specific capacity of 1023.5 F/g.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

One-pot hydrothermal synthesis and supercapacitor properties of NiCo2O4 on Ni foam with varying pH and urea content

  • 期刊论文

  • 发表日期：

    2025年6月10日

查看全文
  • Yusuke Morimoto,
  • Yoshikazu Suzuki

摘要

NiCo2O4, a relatively inexpensive transition metal double-oxide, has attracted much attention as a pseudocapacitor material. In this study, we investigated the effects of the initial pH and urea content during one-pot hydrothermal synthesis on the adhesion to the substrate and the supercapacitor properties. SEM observation revealed that the synthesis conditions influenced the crystal morphology of NiCo2O4 and its adhesion to the substrate. By the N2-sorption BJH method, the peaks of pore sizes of 8 to 10 nm became larger as the amount of urea increased. Each electrode showed a redox reaction, but the specific capacitance changed with each measurement, suggesting that the electrode structure is highly dependent on the hydrothermal coating process. The sample prepared at pH6 without urea showed a maximum specific capacity of 1023.5 F/g.