摘要 |
PURPOSE:To obtain titanium disulfide capable of exhibiting battery characteristics suitable as positive pole active substance in Li secondary batteries at a low cost with excellent productivity by thermally reacting metallic Ti in sulfur vapor containing a very small amount of an alkali metal halide added thereto. CONSTITUTION:A metallic titanium material 8 (e.g., titanium powder) is placed in a titanium charging part 5 of a quartz tube 1 and distilled sulfur 9 containing a very small amount of an alkali metal halide (e.g., LiCl) added thereto is placed in a sulfur charging part 6 to vacuum seal the quartz tube 1. The metallic titanium material 8 is then heated in an electric furnace 3 for heating the titanium and the distilled sulfur 9 is simultaneously heated in an electric furnace 4 for controlling the sulfur vapor pressure to produce vapor of the sulfur. The metallic titanium material 8 is then thermally reacted in the vapor of the sulfur to form titanium disulfide on the surface of the metallic titanium material 8. Even the interior thereof is further reacted by accelerating action with the alkali metal halide contained in the sulfur 9 to produce the titanium disulfide. |