| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a nonaqueous electrolyte secondary battery capable of making lithium stored uniformly in the thickness direction and over the whole area, in a planar direction of an active material layer of an anode. <P>SOLUTION: The manufacturing method of the nonaqueous electrolyte secondary battery has lithium stored by carrying out charging and discharging, consisting of steps (1) and (2). (1) An operation of charging it for a given period of time at 0.5 C or lower under an environmental temperature of 10 to 70 °C, and later leaving it standing for 1 to 48 hours is to be process 1, and the process is repeated twice or more, until a charging potential gets 4 V or higher. (2) Operation of discharging it for a given period of time at 0.5 C or lower under an environmental temperature of 10 to 70 °C, and, later leaving it for 1 to 48 hours is to be one process, and the process is repeated twice or more, until a discharging potential gets 3.3 V or lower. The charging volume at each step of (1) is preferably identical. The discharging volume at each step of (2) is also preferably identical. <P>COPYRIGHT: (C)2008,JPO&INPIT |
