Scholarlink

<p>Manganese oxides are widely studied due to their exceptionally high theoretical specific capacitance and environmentally friendly characteristics. This paper employs an electrooxidation strategy to enhance the energy storage performance of Mn<sub>3</sub>O<sub>4</sub>. The physical and electrochemical properties of the electrode material after multiple cycles are thoroughly investigated. The results demonstrate that, during the electrochemical oxidation process, Mn<sub>3</sub>O<sub>4</sub> is converted to MnO<sub>2</sub>, accompanied by volumetric expansion and a morphological transition from microscopic particles to three-dimensional network structure. Notably, during this transformation, the internal resistance decreases progressively, which subsequently leads to an improvement in specific capacitance. Finally, an asymmetric supercapacitor device, MnO<sub>x</sub>//rGO, is fabricated and used to power a green LED, thereby exploring its practical application. The energy density of the MnO<sub>x</sub>//rGO asymmetric supercapacitor reaches 14.22 Wh kg<sup>−1</sup> at a power density of 199.96 W kg<sup>−1</sup>, surpassing previously reported values.</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

The energy storage performance enhancement via electrochemical strategy for manganese oxide electrode in supercapacitors

  • 期刊论文

  • 发表日期：

    2025年1月28日

查看全文
  • Yuandong Xu,
  • Yuqing Yang,
  • Binyang Liu,
  • Jishan Su,
  • Shenao Li,
  • Pengfei Jia,
  • Xia Zhang,
  • Peng Li

摘要

Manganese oxides are widely studied due to their exceptionally high theoretical specific capacitance and environmentally friendly characteristics. This paper employs an electrooxidation strategy to enhance the energy storage performance of Mn3O4. The physical and electrochemical properties of the electrode material after multiple cycles are thoroughly investigated. The results demonstrate that, during the electrochemical oxidation process, Mn3O4 is converted to MnO2, accompanied by volumetric expansion and a morphological transition from microscopic particles to three-dimensional network structure. Notably, during this transformation, the internal resistance decreases progressively, which subsequently leads to an improvement in specific capacitance. Finally, an asymmetric supercapacitor device, MnOx//rGO, is fabricated and used to power a green LED, thereby exploring its practical application. The energy density of the MnOx//rGO asymmetric supercapacitor reaches 14.22 Wh kg−1 at a power density of 199.96 W kg−1, surpassing previously reported values.