| 摘要 |
<P>PROBLEM TO BE SOLVED: To efficiently manufacture a positive electrode material for a lithium ion secondary battery by increasing the amount of baking material capable of baking at one time by increasing the amount of baking material putting in a baking furnace in consideration of increase in the volume caused by being converted into fine particles of raw material by grinding of the raw material after tentative baking or increase in volume of the baking material in main baking by adding conducive carbon precursors to the raw material after tentative baking. <P>SOLUTION: In the method of manufacturing the positive electrode material for the lithium ion secondary battery manufacturing an iron lithium phosphate system positive electrode material by baking the raw material, the baking process contains a first step increasing from room temperature to 300-450°C, and a second step increasing from the room temperature to baking complete temperature, the aggregate of secondary particles formed by aggregation of primary particles formed by baking of the first step is compressed in the prescribed bulk density, and then baking of the second step is performed. <P>COPYRIGHT: (C)2009,JPO&INPIT |
