The Dissolution Properties of LiCoO2 in Molten 62:38 mol% Li:K Carbonate
- 1 January 1992
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 139 (1) , L6-L8
- https://doi.org/10.1149/1.2069215
Abstract
The lifetime of a Molten Carbonate Fuel Cell (MCFC) is reduced by the slow dissolution of the state‐of‐the‐art lithiated nickel oxide cathode material. is considered to be an alternative cathode material by its good performance in MCFC tests. However, its dissolution rate was not known. In this letter the dissolution properties of in 62:38 at 923 K are reported. The concentration of the dissolved Co2+ ions in the molten carbonate was determined electrochemically and by ICP‐AES. The solubility depends on and . Under cathode‐gas conditions the solubilities ranged from 2 to 13 wt ppm, whereas the corresponding values for lithiated nickel oxide ranged from 7 to 20 wt ppm. The dissolution rate was determined from post‐test analyses of small scale MCFC tests to be less than 0.5 μg Co/cm2 h, which is about an order of magnitude lower than that for nickel oxide.Keywords
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