Potato peels biochar composite with copper phthalocyanine for energy storage application

Ramachandran John Wesley, Arulappan Durairaj, Subramanian Ramanathan, Asir Obadiah, Romiyo Justinabraham, Xiaomeng Lv, Samuel Vasanthkumar

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Generation and disposal of large quantities of bio-waste is a great problem faced all over the world. One of the eco-friendly approaches is to chemically convert bio-waste resources into carbon functional materials. In this work, the abundantly available potato peels waste was converted to bio-char by the hydrothermal carbonization method and the carbon was activated by KOH. The activated carbon material (Pot) was mixed with copper phthalocyanine (Cu-Pc) which is a high nitrogen enriched compound to form a composite material(Cu-Pc/Pot).The synthesized bio-char and the composite material were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), UV–Visible spectroscopy and Raman spectroscopy techniques. The electrochemical behaviors of the synthesized materials were investigated by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). The composite material shows a good capacitance value of 237 F/ g at 0.1 Ag−1 current in a 1 M H2SO4 aqueous electrolyte. The material also exhibits a long cycling stability, up to 1000 cycles at 1Ag−1. These results clearly suggested that Cu-Pc/Pot composite material can be used as a suitable electrode material for electrochemical supercapacitor energy storage applications.

Original languageEnglish
Article number108360
JournalDiamond and Related Materials
StatePublished - May 2021
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2021


  • Bio-char
  • Composites
  • Copper phthalocyanine
  • Potato peels waste
  • Supercapacitor


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