Scholarlink

<p>The device performance of coin cell supercapacitors based on copper oxide/manganese oxide-embedded multi-walled carbon nanotubes (CMM) is reported under redox additive electrolyte (RAE). CMM nanocomposites (NCs) are synthesized by a hydrothermal method and calcined at 300°C. The formation of CMM nanocomposites and their characteristics are analysed. Working electrodes are prepared using CMM NCs and tested in 3&#xa0;M KOH and 0.2&#xa0;M potassium ferrocyanide-incorporated KOH (RAE) electrolytes. Device performance is studied by assembling the CMM NC-modified working electrode and activated carbon anode (asymmetrical type supercapacitor). The assembled supercapacitors deliver energy and power densities of 875&#xa0;Wh kg<sup>−1</sup> and 19.48&#xa0;W kg<sup>−1</sup>, respectively, with specific capacitance of 818.72&#xa0;F g<sup>−1</sup> and 90.5% performance stability (after 5000 charge/discharge cycles) under RAE. To explore the real-time applications, a CR2032 coin cell supercapacitor is fabricated using the CMM NCs, redox additive electrolyte, and activated carbon as the active materials. The coin cell performance is estimated and suggests that the combination of CMM NCs and RAE represents a potential candidate for use in real-time energy storage applications.</p> Graphical Abstract <p></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

Development of Coin Cell Supercapacitors with Superior Charge/Discharge Capacities in Redox Additive Electrolyte

  • 期刊论文

  • 发表日期：

    2025年8月6日

查看全文
  • Hariharan Gubendran,
  • Shanmugapriya Velmurugan,
  • Dineshkumar Devarajan,
  • Bharathi Sambandam,
  • Arivarasan Ayyaswamy

摘要

The device performance of coin cell supercapacitors based on copper oxide/manganese oxide-embedded multi-walled carbon nanotubes (CMM) is reported under redox additive electrolyte (RAE). CMM nanocomposites (NCs) are synthesized by a hydrothermal method and calcined at 300°C. The formation of CMM nanocomposites and their characteristics are analysed. Working electrodes are prepared using CMM NCs and tested in 3 M KOH and 0.2 M potassium ferrocyanide-incorporated KOH (RAE) electrolytes. Device performance is studied by assembling the CMM NC-modified working electrode and activated carbon anode (asymmetrical type supercapacitor). The assembled supercapacitors deliver energy and power densities of 875 Wh kg−1 and 19.48 W kg−1, respectively, with specific capacitance of 818.72 F g−1 and 90.5% performance stability (after 5000 charge/discharge cycles) under RAE. To explore the real-time applications, a CR2032 coin cell supercapacitor is fabricated using the CMM NCs, redox additive electrolyte, and activated carbon as the active materials. The coin cell performance is estimated and suggests that the combination of CMM NCs and RAE represents a potential candidate for use in real-time energy storage applications.

Graphical Abstract