Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 156, Issue 2, Pages 470-479Publisher
ACADEMIC PRESS INC
DOI: 10.1006/jssc.2000.9026
Keywords
oxidic materials; layered structures; ion exchange reaction; lithium batteries; rechargeable
Ask authors/readers for more resources
Layered structure oxides of the system NaCo1-xFexO2 were prepared for 0 less than or equal to x less than or equal to 1 by solid-state reaction. Vegard-like behavior was proved for these compounds by X-ray analysis, indicating mixed transition metal layers and sodium layers without cation disorder. By ion-exchange of these compounds in a molten eutectic mixture of LiCI and LiNO3 at 260 degreesC the system LiCo1-xFexO2 was prepared for the whole composition range and characterized by chemical analysis, X-ray diffraction and FTIR spectroscopy. Atomic absorption spectroscopy showed almost complete ion-exchange from sodium to lithium. The members of this system are shown to crystallize, as the sodium compounds, in the rhombohedral space group R(3) over bar m (alpha -NaFeO2-type). X-ray diffraction, considerations based on the intensity ratio R-101 = I-101/I-104 and Rietveld refinement give evidence for increasing cation disorder with increasing iron content, that reaches the value of LiFeO2 (4.5%) already at an iron content of x = 0.4. (C) 2001 Academic Press.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available