| 摘要 |
The present invention provides a rechargeable negative electrode for a non-aqueous electrolyte secondary battery comprising an alloy material which absorbs lithium during charge and desorbs lithium during discharge, and having a long cycle life. The negative electrode includes an alloy having a hexagonal closest packing structure and a Ni2In type structure composed of at least two elements. Said alloy may comprise an intermetallic compound containing at least one element selected from the group consisting of Sn, Si, and In, or at least one intermetallic compound selected from the group consisting of Ti2Sn, NiCoSn, Mn2Sn, Ni3Sn2, BeSiZr, Co3Sn2, Cu2In, Ni2In, Ni2Si, Pd3Sn2 and Rh3Sn2. |
