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http://dx.doi.org/10.5229/JKES.2003.6.3.178

Characteristics of Three-Component Carbonate Electrolytes in Terms of Oxygen Reduction and NiO Dissolution  

Lee, C.G. (Korea Electric Power Research Institute(KEPRI))
Taniguchi, T. (Dept. of Applied Chemistry, Tohoku University)
Uchida, I. (Dept. of Applied Chemistry, Tohoku University)
Publication Information
Journal of the Korean Electrochemical Society / v.6, no.3, 2003 , pp. 178-182 More about this Journal
Abstract
The oxygen reduction and NiO dissolution behaviors in Li-Na-K three component carbonate melts have been investigated with various compositions through electrochemical and chemical ways. The oxygen reduction currents and NiO solubilities were measured at $650^{\circ}C$ and atmospheric condition in Li-Na-K =47.4-32.6-20, 60-20-20, 50-40-10, $40-40-20 mol\%$ carbonate melts. The oxygen reduction currents showed dependence on the composition, indicating oxygen solubility is a function of carbonate composition. At the composition of $ Li-Na-K=50-40-10 mol%$, a broader peak was observed, suggesting different oxygen reduction mechanism probably prevails in this composition. In contrast, insignificant differences of NiO solubility were obtained among the compositions.
Keywords
Molten carbonates; Oxygen reduction; Nickel oxide dissolution;
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