| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a negative electrode active material containing Sn, having a large charge/discharge capacity and applicable to a lithium ion secondary battery for general use, and to provide a production method of the negative electrode active material, and a lithium ion secondary battery containing Sn as a negative electrode active material, having a large charge/discharge capacity and applicable to general use. <P>SOLUTION: The production method of the negative electrode active material for a lithium ion secondary battery containing tin (Sn) includes a first step for mechanically milling a tin material containing SnO as a main component, and a second step for performing oxidation treatment of the tin material subjected to mechanical milling. Sn and SnO<SB POS="POST">2</SB>are produced by mechanically milling the SnO, and it is believed that the amount of SnO<SB POS="POST">2</SB>increases furthermore by performing oxidation treatment of the product. Since Sn and SnO<SB POS="POST">2</SB>react on Li reversibly as different negative electrode active materials, it is believed that the charge/discharge capacity is large, and they are applicable to a lithium ion secondary battery of general use. <P>COPYRIGHT: (C)2013,JPO&INPIT |
