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

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• 作者：R. Berthelot ; M. Pollet ; J.-P. Doumerc ; C. Delmas
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：July 18, 2011
• 年：2011
• 卷：50
• 期：14
• 页码：6649-6655
• 全文大小：974K
• 年卷期：v.50,no.14(July 18, 2011)
• ISSN：1520-510X

文摘

A new ordered (Li/Ag)CoOb>2b> 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)CoOb>2b> precursor. This compound is actually an intermediate step to the final D4-AgCoOb>2b> delafossite and can be isolated thanks to the kinetics difference between the Li⁺/Ag⁺ and Na⁺/Ag⁺ exchange processes. It crystallizes in the P6b>3b>/mmc space group with cell parameters ab>hex.b> = 2.848(3) 脜 and cb>hex.b> = 21.607(7) 脜. The details of the structure as well as its thermal stability and transport properties are presented and discussed.