SYNTHESIS, CHARACTERIZATION AND ELECTROCHEMICAL PERFORMANCE OF ACTIVATED CARBON SUPPORTED MnO2 FOR ELECTROCHEMICAL CAPACITOR

Thuy Thu Luong Thi, Khu Van Le, Lien Kim Nguyen Thi

Abstract


MnO2 was synthesized by adding activated carbon into KMnO4 solution and stirred in a magnetic or ultrasonic stirrer. The obtained MnAC samples were characterized by means of XRD, TGA, TPR-H2, SEM and BET. All samples are amorphous and have porous structure. MnAC-M prepared by magnetic stirring have higher manganese content, earlier reduction temperature, smoother surface area while MnAC-U prepared by ultrasonic stirring have larger specific surface area and pore volume.


Keywords


Electrochemical capacitor, activated carbon, manganese oxide, magnetic stirring, ultrasonic stirring

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DOI: https://doi.org/10.15625/2525-2518/56/5/10997

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Published by Vietnam Academy of Science and Technology