Electrodeposition of Manganese Oxide Nanosheets as Supercapacitor Electrode Materials

Tuntumrong Wanchaem; Songsak Rattanamai; Paweena Dulyaseree; Wirat Jarernboon; Winadda Wongwiriyapan

doi:10.4028/www.scientific.net/KEM.675-676.273

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 675-676Electrodeposition of Manganese Oxide Nanosheets as...

Electrodeposition of Manganese Oxide Nanosheets as Supercapacitor Electrode Materials

Abstract:

Manganese oxide (MnO_x) thin films were prepared on stainless steel (SS) 304 by galvanostatic (GS) mode of electrodeposition technique using different precursors; 0.1 M potassium permanganate (KMnO₄) and 0.1 M manganese sulfate (MnSO₄) solutions. The electrodeposition condition was set at a constant current of 1 mA/cm². Different precursors provide MnO_x thin films with different morphologies. Using KMnO₄ as a precursor, the MnO_xthin film was deposited (MnO_x-K), while using MnSO₄ as a precursor, the MnO_x nanosheets with a thickness of approximately 40 nm were formed (MnO_x-S). XPS results evidence the formation of manganese oxide with different oxidation states composition by different precursors. Electrochemical measurements were carried out in a three-electrode setup using Pt and Ag/AgCl electrodes as counting and reference electrodes, respectively and 1M Na₂SO₄ aqueous solution as electrolyte. MnO_x-K at a deposition time of 10 min shows the highest specific capacitance of 233.55±19.01 F/g. The specific capacitance improvement of MnO_x-K may be attributed to MnO_x nanosheet structure which increases surface area of electrode.

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Periodical:

Key Engineering Materials (Volumes 675-676)

Pages:

273-276

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.675-676.273

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Online since:

January 2016

Authors:

Tuntumrong Wanchaem, Songsak Rattanamai, Paweena Dulyaseree, Wirat Jarernboon, Winadda Wongwiriyapan*

Keywords:

Electrodeposition, Manganese Oxide, Nanosheet, Supercapacitor

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