(Li/Ag)CoO2: A New Intergrowth Cobalt Oxide Composed of Rock Salt and Delafossite Layers

A new ordered (Li/Ag)CoO2 layered compound with an unusual oxygen packing combining rock salt and delafossite layers is obtained during the (Li+, Na+)/Ag+ ionic exchange from the OP4-(Li/Na)CoO2 precursor. This compound is actually an intermediate step to the final D4-AgCoO2 delafossite and can be i...

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Bibliographic Details
Published in:Inorganic chemistry 2011-07, Vol.50 (14), p.6649-6655
Main Authors: Berthelot, R, Pollet, M, Doumerc, J.-P, Delmas, C
Format: Article
Language:English
Online Access:Get full text
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Summary:A new ordered (Li/Ag)CoO2 layered compound with an unusual oxygen packing combining rock salt and delafossite layers is obtained during the (Li+, Na+)/Ag+ ionic exchange from the OP4-(Li/Na)CoO2 precursor. This compound is actually an intermediate step to the final D4-AgCoO2 delafossite and can be isolated thanks to the kinetics difference between the Li+/Ag+ and Na+/Ag+ exchange processes. It crystallizes in the P63/mmc space group with cell parameters a hex. = 2.848(3) Å and c hex. = 21.607(7) Å. The details of the structure as well as its thermal stability and transport properties are presented and discussed.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic200534x