Abstract: Titanium disulphide particles comprising orthogonally intersecting plates, and having a relatively high surface area, e.g. above 4 m.sup.2 /g, in relation to its size, e.g. average largest diameter 2-16 microns, and a method for its preparation by the vapor phase reaction between titanium tetrachloride and hydrogen sulphide is provided. This material is susceptible to intercalation by, for example, lithium and may be used as an active cathodic material in electrochemical cells such as secondary batteries.

Abstract: Titanium disulphide having a stoichiometry very near to the theoretical value may be produced by reacting titanium tetrachloride and hydrogen sulphide in the vapor phase under controlled temperature conditions, the product particles being entrained in a gas stream and thereby removed from the reaction zone. The partial pressure of the reactants is preferably also controlled. Product particles substantially consisting of particles having diameters in the range 1 to 50 microns may be produced. The product may be used as a cathode material in batteries.