| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a positive active material for a non-aqueous lithium secondary battery that is made of fine and uniformly dispersed spherical particles without having impurities and has high purity, and its positive active material, and a secondary battery. <P>SOLUTION: In the manufacturing process of a positive active material that is a composite oxide of a transitional metal compound and a lithium compound, a grinding process by a wet jet-mill is provided. For example, it comprises a first wet jet-mill process in which, by measuring by a prescribed ratio lithium carbonate and cobalt oxide and making a slurry by adding water to these and transferring by high pressure the slurry into a nozzle arranged facing each other in the pressure container from the facing flow passage, and by making the facing flows of these slurries mutually collide and merge, the material is ground and made into particulates, and a second wet jet-mill process in which after the drying 1, firing 1 and grinding, water is added again to the complex oxide and a slurry is made, and this is again wet ground, and then by drying 2, firing 2 and grinding, the positive active material is manufactured. <P>COPYRIGHT: (C)2003,JPO |
