Journal
ELECTROCHEMICAL AND SOLID STATE LETTERS
Volume 12, Issue 6, Pages A115-A119Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.3110010
Keywords
anodes; cathodes; electrodeposition; manganese compounds; supercapacitors
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Among the various Mn compounds, both MnO2 and Mn(OH)(2) are electrochemically active in supercapacitor studies. MnO2 and Mn(OH)(2) are simultaneously deposited, through a one-pot method, on the anode and cathode, respectively, of a galvanostatic electrolysis cell consisting of aqueous Mn(NO3)(2) electrolyte. MnO2 and Mn(OH)(2) coated stainless steel (SS) electrodes are found to exhibit a capacitive behavior with a high specific capacitance. MnO2/SS and Mn(OH)(2)/SS electrodes are used as the negative and positive electrodes, respectively, in assembling nonsymmetrical capacitors and testing. The results indicate that both Mn-based electrodes prepared simultaneously in a single electrolysis possess interesting electrochemical properties for supercapacitor application.
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