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Titanium Dioxide as a Cathode Material in a Dry Cell

Author(s): Duncan ALOKO | Eyitayo Amos AFOLABI

Journal: Leonardo Electronic Journal of Practices and Technologies
ISSN 1583-1078

Volume: 6;
Issue: 11;
Start page: 97;
Date: 2007;
Original page

Keywords: Dry cell | Cathode Materials | Depolarization | Potentiometric Titration

Titanium dioxide was proposed as an alternative cathode material in place of Manganesse (IV) oxide. TiO2 was found to be highly polarized when in an electric field and its surface area of adsorption of solution determined to be 1070.32 m2/g. The adsorption of alkaline anions (i.e. SO42- , NO3-, Cl- and Br-) were investigated. The anions were adsorbed between the layers of the cathode material thereby altering its surface texture for a better performance. Increase in concentration of the anions solution enhances greater electric surface charge. Thus, sulphate ion is having the best result as compared to other anions because of its highest electric charge and adsorption at 1M concentration of solution. This is in agreement with the relative position of ions in the electrochemical series in the decreasing order of electro- negativity as well as in the increasing order of preference for discharge.
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