| 摘要 |
PURPOSE:To produce spherical manganese oxide powder having excellent filling ability and dispersibility by spraying an aq. soln. of manganese compd. to make droplets and by heating the droplets. CONSTITUTION:The aq. soln. of manganese compd. having 50-400g/l concn. is prepd. by dissolving manganese compd. (e.g., manganese nitrate, manganese chloride) in pure water, etc. At that time, lithium compd. such as lithium hydroxide, lithium carbonate may be dissolved in the soln. and in the case, the concn. of manganese is about 50-300g/l. Then, the aq. soln. of manganese compd. is sprayed with a sprayer to make droplets and the droplets are heated at about 150-900 deg.C for about 1-5min to product the spherical manganese oxide powder. Thereby, the spherical manganese oxide useful as active material for a positive electrode of lithium secondary battery, is obtd. |
