| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance charge discharge cycle characteristics by sufficiently bonding a negative mix layer with a negative current collector in a lithium secondary battery using a negative electrode in which the negative mix layer containing negative active material particles containing silicon and/or silicon alloy and a binder are formed on the surface of the negative current collector. <P>SOLUTION: In the lithium secondary battery equipped with a positive electrode 1, a negative electrode 2 and a nonaqueous electrolyte, the negative mix layer containing the negative active material particles containing silicon and/or silicon alloy and the binder is formed on the surface of the negative current collector by baking, and the ratio of the binder in the vicinity of the negative current collector is made 2.5 times or more that in the position far from the negative current collector. <P>COPYRIGHT: (C)2007,JPO&INPIT |
