| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress gas evolution in a nonaqueous electrolyte secondary battery. <P>SOLUTION: A positive active material is manufactured by coating composite oxide particles mainly comprising lithium nicklate with a silicate compound and then conducting heat treatment. In the secondary battery using the positive active material manufactured in the process and having a carbonate ion content of 0.15 wt.% of less, gas evolution in the battery can be suppressed. The heat treatment is conducted at 300-1,200°C. As the silicate compound, colloidal silica is preferably used, 100 pts.wt. composite oxide particles are coated with 0.01-5.0 pts.wt. silicate compound, and heat treatment is conducted. <P>COPYRIGHT: (C)2010,JPO&INPIT |
