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<p>Hexamethylenediamine-functionalized graphene oxide (HMDA-GO) was synthesized using a simple efficient sonication technique by treating graphene oxide (GO) with hexamethylenediamine to yield amine-functionalized GO (Amine-GO). The material was characterized using Raman spectroscopy, FT-IR, TGA, XRD, and XPS. Electrochemical evaluations revealed a significant enhancement in specific capacitance, with HMDA-GO achieving 287 F g⁻<sup>1</sup> at five mV s⁻<sup>1</sup>, compared to 136 F g⁻<sup>1</sup> for non-functionalized reduced GO (rGO). This improvement is attributed to pseudocapacitance effects facilitated by electron-donating amide groups and electron-accepting GO, promoting efficient charge transfer. HMDA-GO also demonstrated excellent cycling stability (85% retention after 5000 cycles), low series resistance (0.4 Ω), and an energy density 2.5 times higher than rGO. These results highlight HMDA-GO as a promising material for high-performance supercapacitor electrode applications.</p>

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Hexamethylenedimine functionalized graphene oxide: a promising and supporting carbonaceous electrode material in supercapacitor

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Mangesh S. Dhore,
  • Qurratul Ain Kausar Ansari,
  • Hirasing T. Manza,
  • Vivek B. Korde,
  • Suhas Khot,
  • Prakash Malvadkar,
  • Shankar Amalraj

摘要

Hexamethylenediamine-functionalized graphene oxide (HMDA-GO) was synthesized using a simple efficient sonication technique by treating graphene oxide (GO) with hexamethylenediamine to yield amine-functionalized GO (Amine-GO). The material was characterized using Raman spectroscopy, FT-IR, TGA, XRD, and XPS. Electrochemical evaluations revealed a significant enhancement in specific capacitance, with HMDA-GO achieving 287 F g⁻1 at five mV s⁻1, compared to 136 F g⁻1 for non-functionalized reduced GO (rGO). This improvement is attributed to pseudocapacitance effects facilitated by electron-donating amide groups and electron-accepting GO, promoting efficient charge transfer. HMDA-GO also demonstrated excellent cycling stability (85% retention after 5000 cycles), low series resistance (0.4 Ω), and an energy density 2.5 times higher than rGO. These results highlight HMDA-GO as a promising material for high-performance supercapacitor electrode applications.