| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous secondary battery which can restrain expansion/contraction of a negative electrode during charge and discharge and is excellent in cycle characteristics at high capacity. <P>SOLUTION: In the nonaqueous secondary battery having a negative electrode in which at least one alloy material selected from elements capable of alloying with lithium by charging and its compound and a carbon material, a positive electrode, and a nonaqueous electrolyte, a ratio of the alloy material on the total amount of the alloy material and the carbon material is 1-30 wt.%, and an average particle diameter of the alloy material is 2/5 or less that of the carbon material. <P>COPYRIGHT: (C)2010,JPO&INPIT |
