Layered metal chalcogenides Intercalation

Rouxel, J. Layered Metal Chalcogenides and Their Intercalation Chemistry. In Comprehensive Supramolecular Chemistiy, Atwood. J.L.. Davies, J.E.D.. MacNicol. D.D.. Vogtle. F., Eds. Pergamon Oxford. 1996 Vol. 7. 77-105. 

Although there are numerous families of lamellar solids, only a handful of them exhibit the kind of versatile intercalation chemistry that forms the basis of this book. In arriving at the content of this volume, the editors have accurately identified six classes of versatile layered compounds that are at the forefront of materials intercalation chemistry, namely, smectite clays, zirconium phosphates and phos-phonates, layered double hydroxides (known informally as hydrotalcites or anionic clays ), layered manganese oxides, layered metal chalcogenides, and lamellar alkali silicates and silicic acids. Graphite and carbon nanotubes have not been included, in part because this specialty area of intercalation chemistry is limited to one or two molecular layers of comparatively small guest species that are capable of undergoing electron transfCT reactions with the host structure. 

Many layered metal chalcogenides may be used as a cathodic (positive) insertion elecUode in rechargeable alkali metal batteries because of their ability to reversibly intercalate alkali metal cations [11,12,96], Any useful electrode material must fulfill most of the following requirements ... 

A peculiar class is formed by ternary metal chalcogenides M, tMQ2 (M is a 3d TM, M=Group 4-6 metal Q=S, Se, Te, x < 1). They formally can be regarded as intercalates of 3d metal between the chalcogen layers of parent MQ2. The resulting structure features linear chains of... 

Rouxel J (1978) Alkali metal intercalation compounds of transition metal chalcogenides TX2, TX3 and TX4 chacogenides. In Levy F (ed) Intercalated layer materials. Reidel, Dordrecht, pp 201-250... 

In this chapter, we present the physical properties of cathodes materials and verify the applicability of the rigid-band model for intercalation compounds with a layered structure namely transition-metal chalcogenides MX2 (M = Ti, Ta, Mo, W X = S, Se) and oxides LLWO2 (M = Co, Ni) as well. Electrical and optical properties are investigated. For some materials, we observe different degrees of irreversibility in the intercalation process and lattice evolution to the complete destruction of the host. Since the purpose here is the study of the materials in the framework of... 

Layered chalcogenides such as TaS2 can accommodate large molecules such as stearamide. We shall be discussing the intercalation chemistry of these and other layered materials in Chapter 8. TaS2 is metallic and superconducting [T = 0.8 K) and the superconducting transition is increased to 3.5 K by incorporation of pyridine the interlayer separation increases from 3 to 6 A. Octadecylamine increases the interlayer... 

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