| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery having high energy density and capable of preventing the generation of expansion when it is left in the high-temperature condition. <P>SOLUTION: In this nonaqueous electrolyte secondary battery including a negative electrode provided with a negative mix layer and a negative electrode collector, the negative mix layer contains a negative electrode active material and a binder, and the negative electrode active material contains a material, which contains Si and O, and a carbon material. Atomic ratio x of O in relation to Si in the material, which contains si and O, satisfies an expression 0<x<2, and the binder contains SBR, and adhesion strength between the negative electrode mix layer and the negative electrode collector is 75 N/m or more. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
