Coating activated carbon from coconut shells with Co3O4/CeO2 for high-performance supercapacitor applications: An experimental study

Activated carbon from coconut shells is a low-cost, environmentally friendly material that is available for fabricating the electrodes for electric double-layer capacitance supercapacitors. As such, activated carbon derived from coconut shells was coated with Co3O4/CeO2, and its electrical and ionic...

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Bibliographic Details
Published in:Bioresources 2021-11, Vol.16 (4), p.8022-8037
Main Authors: Chopngam, Krittiya, Luengchavanon, Montri, Khangkhamano, Matthana, Chetpattananondh, Kanadit, Limbut, Warakorn
Format: Article
Language:English
Subjects:
Activated carbon
Capacitance
Carbon
Cerium oxides
Coatings
Cobalt oxides
Conductivity
Electrical resistivity
Electrodes
Electrolytes
Energy storage
Fourier transforms
Investigations
Ion currents
Nyquist plots
Ratios
Shells
Supercapacitors
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Summary:Activated carbon from coconut shells is a low-cost, environmentally friendly material that is available for fabricating the electrodes for electric double-layer capacitance supercapacitors. As such, activated carbon derived from coconut shells was coated with Co3O4/CeO2, and its electrical and ionic conductivity were evaluated. The ternary technique for selecting materials was systematically investigated with an economical process. The Co3O4/CeO2 coating that was formed on the activated carbon coconut shells was deemed AC-Co3O4-CeO2. The 90-05-05 composite was the best electrode for electric double-layer capacitance supercapacitors, resulting in high conductivity (0.62 x 103 S·cm2), low series resistance and internal resistance (based on the Nyquist plot), and the charge-discharge was able to reach 0.56 V for 90 seconds (1A/g). Therefore, activated carbon coconut shells coated in Co3O4/CeO2 can promote the necessary characteristics of electrodes needed for electric double-layer capacitance supercapacitors.
ISSN:1930-2126
1930-2126
DOI:10.15376/biores.16.4.8022-8037