Regensburg 2004 – wissenschaftliches Programm

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M: Metallphysik

M 26: Nanoskalige Materialien IV

M 26.1: Vortrag

Donnerstag, 11. März 2004, 11:45–12:00, H16

Synthesis and Copper Intercalation Studies of Nanostructured Transition Metal Sulphides — •H. A. Therese, F. Rocker, E. W. Finckh, J. Li, A. Gloskovskij, G. H. Fecher, G. Schönhense, U. Kolb, and W. Tremel — Johannes Gutenberg - Universität, 55099 Mainz

Research on nanostructure materials has grown exponentially during the last decade due to their interesting properties exhibited by quantum confinement of electrons. In particular, the ability of layered materials to curl up into nanotubes has drawn the attention of many scientists which in turn opened up a new era in nanotechnology. Further, layered transition metal chalcogenides have potential applications as cathode materials for rechargeable high-energy density lithium batteries, as catalysts for hydrosulfurisation or as lubricants. The main goal of our research is to synthesise nanostructured transition metal sulphides and studying their behaviour if intercalated by copper. Nanostructured MoS₂ (amorphous) was prepared by thermal decomposition of (NH₄)₂Mo₃S₁₃ x H₂O at 720K in sealed tubes and nanotubes of MoS₂ were prepared by coating technique using SiO₂ tubes as template. Intercalation of Cu into MoS₂ was carried out by computer-controlled galvanostatic cathodic reduction of MoS₂ with a three electrode arrangement. The samples were characterised by X-ray diffraction (XRD), High resolution transmission electron microscopic (HRTEM) and X-ray absorption spectroscopic (XANES) techniques.