| 摘要 |
Disclosed is a positive electrode material for lithium secondary batteries which is characterized in that it is composed of an aggregate of particles of an Li-A-O complex oxide (wherein A represents one or more metal elements selected from Mn, Fe, Co and Ni), the lithium complex oxide contains 20-100 ppm (by mass) of P, and the total impurity content other than the essential components is not more than 2000 ppm. Also disclosed is a method for producing a positive electrode material for lithium secondary batteries which is characterized by such a procedure wherein after suspending a lithium carbonate in water, a metal salt solution of one or more metal element selected from Mn, Fe, Co and Ni is introduced in the lithium carbonate suspension while also adding a small amount of a phosphoric acid thereinto so that the P content in the resulting Li-A-O complex oxide particles is to be 20-100 ppm (by mass), and the thus-obtained carbonate is filtered, cleaned, dried and then oxidized, thereby forming an aggregate of the Li-A-O complex oxide particles containing 20-100 ppm (by mass) of P. The positive electrode material for lithium secondary batteries is improved in sintering properties and battery characteristics. |
