| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a battery capable of increasing the capacity and cycling characteristics. <P>SOLUTION: A battery can 11 incorporates a winding electrode 20 where a positive electrode 21 and a negative electrode 22 are laminated and wound through a separator 23. The positive electrode 21 contains a positive-electrode active material, of which amount in a unit volume of a battery is 1.15 g/cm<SP>3</SP>or more. The negative electrode 22 has an attached negative-electrode active material layer 22B, which contains a graphite with a bulk density of 1.2 g/cm<SP>3</SP>or more and a breakdown strength of 50 MPa or more, and has a volume density in a range from 1.85 to 2.1 g/cm<SP>3</SP>. <P>COPYRIGHT: (C)2007,JPO&INPIT |
