Capacitive behavior of functionalized activated carbon-based all-solid-state supercapacitor

In this report, we incorporate activated carbon (AC) onto aluminum substrate via doctor blade method to produce an all-solid-state supercapacitor. The electrochemical properties of the all-solid-state supercapacitor were characterized by cyclic voltammetry and electrochemical impedance spectroscopy....

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Bibliographic Details
Published in:Carbon Letters 2021-10, Vol.31 (5), p.1041-1049
Main Authors: Lee, Kyu Seok, Seo, Ye Ji, Jeong, Hyeon Taek
Format: Article
Language:English
Subjects:
Acids
Activated carbon
Aluminum
Capacitance
Discharge
Electric vehicles
Electrochemical analysis
Electrochemical impedance spectroscopy
Electrochemistry
Electrodes
Electrolytes
Electrons
Energy storage
Fourier transforms
Functional groups
Impedance
Morphology
Nitric acid
Polymers
Polyvinyl alcohol
Solid state
Spectroscopy
Substrates
Supercapacitors
Voltammetry
Work stations
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Summary:In this report, we incorporate activated carbon (AC) onto aluminum substrate via doctor blade method to produce an all-solid-state supercapacitor. The electrochemical properties of the all-solid-state supercapacitor were characterized by cyclic voltammetry and electrochemical impedance spectroscopy. Galvanostatic charge/discharge tests also were carried out to exhibit stability of the AC-based supercapacitor. The impedance and charge/discharge curves of the all-solid-state supercapacitor showed good capacitive behavior after functionalized AC. The highest specific capacitance obtained for the AC-based supercapacitor was 106 F g −1 . About 160% of specific capacitance increased after functionalization of the AC, which indicated that modification of the AC by nitric acid was able to introduce functional groups on the AC and improve its electrochemical performances.
ISSN:1976-4251
2233-4998
DOI:10.1007/s42823-020-00219-w