| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a battery little in swelling at the time of quick charging by a current density of ≥1.5C rate at a low temperature of ≤0°C, and having a capacity density and a cycle life property not less than that of the conventional one at room temperature. <P>SOLUTION: In a nonaqueous electrolyte secondary battery with a positive electrode, a negative electrode and a nonaqueous electrolyte, the negative electrode contains a material containing an Sn<SB>4</SB>Ni<SB>3</SB>phase and an Sn phase and a carbon material, and in the material containing the Sn<SB>4</SB>Ni<SB>3</SB>phase and the Sn phase in the negative electrode, when the mass of the Sn<SB>4</SB>Ni<SB>3</SB>phase is set to m1, the mass of the Sn phase is set to m2, and Z is set as Z=m1/m2, Z is made to be in the range of 0.2≤Z≤3. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
