| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery capable of drastically restraining voltage drop in high-rate discharge (large-current discharge). <P>SOLUTION: As a negative electrode active material 2, carbon materials such as natural graphite, artificial graphite, non-graphitized carbon, and cork (charcoal) can be used. Further, a negative electrode comprises an active material layer including a group of particulate negative electrode active materials 2, and nickel is carried on a surface of the active material layer. Examples of a method of carrying nickel on a negative electrode surface 3 include a method by coating, a deposition method, and a method of bringing nickel ions into existence in a nonaqueous electrolyte to deposit nickel on the negative electrode surface 3. The amount of nickel added to the nonaqueous electrolyte is 0.0008 mol/l to 0.007 mol/l. <P>COPYRIGHT: (C)2007,JPO&INPIT |
