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05- International Journal of Thin Film Science and Technology
An International Journal


Volumes > Vol. 5 > No. 2


Hydrothermal Growth of MnO2 at 95 oC as an Anode Material

PP: 121-127
D. Vernardou, A. Kazas, M. Apostolopoulou, N. Katsarakis, E. Koudoumas,
The hydrothermal growth of manganese dioxide was carried out on indium tin dioxide coated glass substrates using potassium permanganate at 95 oC for 24 h and adjusting the pH solution to 3 and 4 through nitric acid. The best capacitive response was observed from the hexagonal ε-manganese dioxide at pH 4 having a specific charge of 129 1 A g-1 and specific discharge capacity of 943 mAh g-1 with capacitance retention of 98 % after 500 scans at 4 A g-1 presenting high rate performance and good stability. The importance of achieving crystalline electrodes with high specific surface area towards the improvement of their capacitive performance for power devices is highlighted.

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