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Hydrothermal Growth of MnO2 at 95 oC as an Anode Material |
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PP: 121-127 |
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doi:10.18576/ijtfst/050207
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Author(s) |
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D. Vernardou,
A. Kazas,
M. Apostolopoulou,
N. Katsarakis,
E. Koudoumas,
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Abstract |
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| 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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