| Title of Article |
Electrochemical mechanisms of activated carbon, α-MnO2 and composited activated
carbon-α-MnO2 films in supercapacitor applications |
| Date of Acceptance |
21 August 2021 |
| Journal |
| Title of Journal |
Applied Surface Science |
| Standard |
SCOPUS |
| Institute of Journal |
elsvier |
| ISBN/ISSN |
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| Volume |
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| Issue |
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| Month |
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| Year of Publication |
2021 |
| Page |
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| Abstract |
Pure α-MnO2 and activated carbon-MnO2 (AC-MnO2) films coated on Ni foam by
electrophoretic deposition were applied as a supercapacitor electrode. The specific
capacitance of AC-MnO2 films (155.03 F×g-1) surpasses those of the pure AC (110.62
F×g-1) and pure MnO2 film in the 1 M NaOH electrolyte. EDX and XPS detect an
increase in the Na content and the reduction of Mn4+ to Mn3+ on the discharged
MnO2 electrode (at 0 V), whereas a decrease in the Na content and the oxidation of
Mn3+ to Mn4+ were obtained on the charged MnO2 electrode (at 0.45 V).
Computational simulation of the Na inserted α-MnO2 structure displays the connection
of Na to O atoms and the increasing electron density on Mn atoms. EDX of the
charged AC-MnO2 (at -1.0 V) film detects a rise in the Na and a fall in the O contents,
but the discharged AC-MnO2 film (at 0 V) shows a decrease in Na and increase in O
contents. The AC-MnO2 film could retain 82.29% of the initial specific capacity after
10,000 cycles. Four series-supercapacitor coin cell assembled from the AC-MnO2
anode and MnO2 cathode delivers a power density of 2.79 kW×kg-1 and an energy
density of 168.8 Wh×kg-1. |
| Keyword |
Supercapacitor; MnO2; activated carbon; electrophoretic; nanoparticles |
| Author |
|
| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ได้รับการตอบรับให้ตีพิมพ์ |
| Level of Publication |
นานาชาติ |
| citation |
false |
| Part of thesis |
true |
| Attach file |
|
| Citation |
0
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Publication
Journal Publication
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