Formation of Aligned Nanotubular TiSx Structures by Thermal Treatment of TiO2 in H2S

Wednesday, 8 October 2014
Expo Center, 1st Floor, Center and Right Foyers (Moon Palace Resort)
R. Kirchgeorg, R. Hahn, and P. Schmuki (University of Erlangen-Nuremberg (FAU))
This talk will present the formation of highly aligned nanotubular TiSx electrodes consisting of self-organized TiO2 nanotubes formed by thermal heat treatment in H2S gas. Depending on the annealing time and temperature several mixtures of titanium oxy-sulfides can be formed. Even a complete transformation into TiS2 is possible under the right conditions. The formed TiSx layers show a slightly modified tubular structure compared to the original TiO2 nanotubes, but still offer a high surface area in form of tubular structure. The formed TiSx were characterized by SEM, XRD, XPS and tested regarding their battery performance as a cathode material for lithium ion batteries.

References concering high temperature treatments in reactive gas envoirment:

Y.-C. Nah, I. Paramasivam, R. Hahn, N. K Shrestha and P. Schmuki, Nanotechnology 21 (2010) 105704

R. Hahn, F. Schmidt-Stein, J. Salonen, S. Thiemann, Y. Song, J. Kunze, V.-P. Lehto and Patrik Schmuki, Angew. Chem. Int. Ed. 48 (2009) 7236 –7239