| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a negative electrode material for a lithium secondary cell capable of preventing a cover containing an Sn intermetallic compound from falling off from a current collector by absorbing and alleviating stress generated at the time of expansion/contraction of a negative electrode at charge and discharge, and with improved charging/discharging cycle characteristics. <P>SOLUTION: The negative electrode material for a lithium secondary cell has a cover layer on the current collector, and the cover layer is a layer formed by applying heat treatment to the plating of Sn or Sn-M (M=Cu, Ni, Co, Fe) having a form including a vacant space, containing the Sn-M group intermetallic compound having a form including vacant space. <P>COPYRIGHT: (C)2004,JPO |
