| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve the initial charge completion in a short time while maintaining high cycle characteristics, in a power storage device using a metal material, e.g. silicon, as a negative electrode material. <P>SOLUTION: The manufacturing method of a lithium ion power storage device comprising a positive electrode, an alloy based negative electrode, and a lithium ion supply source for predoping the negative electrode with lithium ions includes: a predoping step for predoping the negative electrode at a low charging rate; and an initial charging step for performing initial charge at a higher charging rate than that in the predoping step. Initial charging after predoping is performed at a high charging rate, and the initial charge completion time can be shortened by performing initial charge at a high charging rate while enhancing the cycle characteristics. <P>COPYRIGHT: (C)2013,JPO&INPIT |
