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<p>In this study, C.I. Pigment Blue 15:3, an organic phthalocyanine based pigment, was used as a precursor to synthesize activated carbon/copper/copper oxide composite through a carbonization and activation process. The resulting composite was investigated to evaluate the potential use as a hybrid capacitor electrode of supercapacitor and pseudo-capacitor. Precursor was pre-treated at 600&#xa0;°C, followed by activation at 750&#xa0;°C using alkaline activating agents (KOH and K<sub>2</sub>CO<sub>3</sub>). Neutral ZnCl<sub>2</sub> activating agent was also used for activation at 700&#xa0;°C without pre-treatment to compare the electrochemical performance. The KOH activated sample exhibited the presence of Cu, CuO, and Cu<sub>2</sub>O in XRD and XPS analysis results and it also showed a highest specific surface area of 2731 m<sup>2</sup>/g and well-developed 0.7–2.0&#xa0;nm micropores, enhancing ion adsorption in K<sub>2</sub>SO<sub>4</sub> electrolyte. Electrochemical tests revealed that PB_KOH exhibited the highest capacitance, outperforming commercial Norit Carbon at various current densities, due to its Cu/CuO/Cu<sub>2</sub>O/activated carbon composite structure. These findings highlight its strong potential as a high-performance supercapacitor electrode material.</p>

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Facile synthesis of activated carbon/copper/copper oxide composite electrode material for supercapacitors using C.I. Pigment Blue 15:3

  • 期刊论文

  • 发表日期：

    2025年7月14日

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  • Gunhwan Park,
  • Woong Kwon,
  • Jiyeon Cheon,
  • Daeun Kim,
  • Gyeongjin Kim,
  • Euigyung Jeong

摘要

In this study, C.I. Pigment Blue 15:3, an organic phthalocyanine based pigment, was used as a precursor to synthesize activated carbon/copper/copper oxide composite through a carbonization and activation process. The resulting composite was investigated to evaluate the potential use as a hybrid capacitor electrode of supercapacitor and pseudo-capacitor. Precursor was pre-treated at 600 °C, followed by activation at 750 °C using alkaline activating agents (KOH and K2CO3). Neutral ZnCl2 activating agent was also used for activation at 700 °C without pre-treatment to compare the electrochemical performance. The KOH activated sample exhibited the presence of Cu, CuO, and Cu2O in XRD and XPS analysis results and it also showed a highest specific surface area of 2731 m2/g and well-developed 0.7–2.0 nm micropores, enhancing ion adsorption in K2SO4 electrolyte. Electrochemical tests revealed that PB_KOH exhibited the highest capacitance, outperforming commercial Norit Carbon at various current densities, due to its Cu/CuO/Cu2O/activated carbon composite structure. These findings highlight its strong potential as a high-performance supercapacitor electrode material.