| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium secondary battery in which defects of a conductive film formed in a metal foil can be repaired so as to reduce manufacturing cost of the lithium secondary battery. <P>SOLUTION: A conductive film paste 4 including an active material, a conductive assistant, and a binder is applied to the surface of a metal foil 3 and is dried. When there is a defect 1 in the applied conductive film 4, the portion in which there is the defect is recorded and the defect is filled with a defect correction paste 5. The defect correction paste 5 includes the binder but does not include the conductive assistant and the active material. The conductive film 4 is pressed and flattened later, and at this time the portion to which defect correction is performed is also flattened. And an electrode film 4 or the metal foil 3 is not damaged at the time of pressing because there is no particle in the defect correction paste 5. Moreover, the defect area is so small that there is little effect on the battery capacity. <P>COPYRIGHT: (C)2012,JPO&INPIT |
