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News number: 8809161253

16:01 | 2009-12-07

Science

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Synthesis of Nano Manganese Dioxide Reveals Super Capacitors

TEHRAN (FNA)- Iranian experts synthesized nanostructured manganese dioxide by analyzing and controlling electrolyte acidity (pH) which results in increasing its electrochemical power and fabrication of super capacitors with ultra high capacity.



Hadi Adelkhani, the faculty member of Materials and Energy Research Center (MERC), studied the acidity change procedure through electrochemical precipitation of MnO2 and prepared samples of nanostructured manganese dioxide at constant electrolyte acidities.

The effect of electrolyte acidity on the electrochemical performance and properties of samples as super electrochemical capacitors were investigated in addition to the examination of their physicochemical properties.

"The preparation of manganese dioxide from electrolyte containing MnSO4 was made under conditions of measuring electrolyte acidity continuously during the process and fixing it at a definite value. The analysis of resulting manganese dioxide chemical structure was done by potentiometer titration," he said, elaborating on the research steps to the news service of INIC.

The results of the study show that electrolyte acidity is an important factor which changes through the electrochemical precipitation process.

The acidity fixation at a specific value provides the chance for alternating physicochemical properties of manganese dioxide favorably. On the other hand, it would be possible to prepare different nanometric structures with various physicochemical properties from manganese dioxide.

For example, by electrochemical precipitating at a specific value (pH=6) the produced sample will have ultra high electrochemical power which is a result of the changes made in its porosity and nanometric structure.