Titanium sulfides

Titanium sulfide is more chemical compounds of titanium and sulfur :

• the golden brown titanium (II) sulfide , TiS that the Nickelarsenid structure has
• Titanium sulfides with compositions between TiS and TiS ₂ , such as Ti ₃ S ₄ , Ti ₄ S ₅ , Ti ₄ S ₈ , Ti ₈ S ₉
• the black titanium (III) sulfide , Ti ₂ S ₃
• the titanium (IV) sulfides , especially the bronze-colored titanium disulfide TiS ₂ , but also the black, graphitic titanium trisulfide TiS ₃ .

In all titanium sulfides the titanium has the coordination number 6, i.e. H. each titanium atom is surrounded by six sulfur atoms. In titanium trisulfide TiS ₃ , which contains disulfide anions, the sulfur atoms are arranged in a somewhat distorted trigonal prism around the titanium. In all other titanium sulfides, titanium is surrounded by sulfur in an octahedral manner.

None of the titanium sulfides is currently of any greater technical importance. Titanium disulfide can reversibly store lithium and was therefore used for some time as a material for the positive pole in lithium-ion batteries . For example, Exxon used them to make button cells from 1977 to 1979 , primarily for small devices such as watches. Other cathode materials are now preferred, also because TiS ₂ delivers lower voltages than other lithium materials. Nevertheless, the TiS ₂ battery was an important pioneer for modern lithium-ion batteries .

Individual evidence

1. ^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1525.
2. ^ ^{A b} M. S. Whittingham: Lithium Batteries and Cathode Materials , Chem. Rev. 104 (2004) 4273
3. ^ Arne Hessenbruch: Titanium disulfide: the prototype cathode material. June 14, 2001, accessed September 6, 2011 .