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Solubilities of LiFeO/sub 2/ and (Li, K)/sub 2/CrO/sub 4/ in molten alkali carbonates at 650/sup 0/C

Journal Article · · J. Electrochem. Soc.; (United States)
DOI:https://doi.org/10.1149/1.2100840· OSTI ID:5576989

The equilibrium solubilities of LiFeO/sub 2/ and (Li,K)/sub 2/CrO/sub 4/ in 62% Li/sub 2/CO/sub 3-/38% K/sub 2/CO/sub 3/ were determined at 650/sup 0/C under controlled oxidizing conditions simulating those of molten carbonate fuel cells. Both materials appear to dissolve by a nonredox dissolution process, since the solubilities of LiFeO/sub 2/ and (Li,K)/sub 2/CrO/sub 4/ are independent of the partial pressures of CO/sub 2/ and O/sub 2/ over the ranges studied. Equilibrium solubilities of LiFeO/sub 2/ and (Li,K)/sub 2/CrO/sub 4/ in the carbonate mixture were determined to be 78 wppm of iron and 13.7 weight percent of chromium, respectively.

Research Organization:
Oak Ridge National Lab., Oak Ridge, TN 37831
DOE Contract Number:
AC05-84OR21400
OSTI ID:
5576989
Journal Information:
J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 134:9; ISSN JESOA
Country of Publication:
United States
Language:
English