Electrochemical preparation and characterisation of Li zMoS 2−x nanotubes

• Published in: Electrochimica acta Vol. 48; no. 20; pp. 3079 - 3084
• Main Authors: Dominko, Robert, Gaberscek, Miran, Arcon, Denis, Mrzel, Ales, Remskar, Maja, Mihailovic, Dragan, Pejovnik, Stane, Jamnik, Janko
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 2003
• Subjects: Anode material; Electron spin resonance; Lithium ion batteries; MoS 2 nanotubes; Polyaniline composites; Lithium ion batteries; Anode material; MoS 2 nanotubes; Electron spin resonance; Polyaniline composites
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/S0013-4686(03)00384-0

The recent synthesis of self-assembled single-wall MoS 2−xI y (x≈0 and y≈1/3) NTs bundles has given a new material, which can reversibly exchange lithium in non-aqueous electrolytes. It has been found that a relatively large amount of lithium can be inserted into the MoS 2−xI y NTs bundles (up to 3 mol of Li per MoS 2 mol). The amount of inserted lithium and, also, the reversibly extracted lithium, depends on the quality of MoS 2−xI y NTs bundles and their prior treatment. Comparing their electrochemical properties with layered 2H-MoS 2, one finds a significant increase in the amount of inserted lithium and a decrease by about 0.7 V in the potential at which lithium insertion takes place. Furthermore the decrease of electron spin resonance (ESR) signal of lithiated nMoS 2−xI y NTs bundles exposed to the air is slower than the decrease of ESR signal of lithiated layered 2H-MoS 2 crystals which suggests that lithiated MoS 2−xI y NTs bundles are less air-sensitive than the lithiated layered 2H-MoS 2 crystals. These differences are attributed to the particular one-dimensional topology of self-assembled MoS 2−xI y NTs bundles.