Patent Number: 7,611,804

Title: Nonaqueous secondary battery and electronic equipment using the same

Abstract: A nonaqueous secondary battery comprising an electrode body which comprises a positive electrode and a negative electrode laminated with a separator interposed between them, and a nonaqueous electrolyte, wherein said negative electrode comprises graphite as a negative electrode active material, and has a coating density of at least 1.70 g/cm.sup.3, pore diameter of the maximum of less than 0.5 .mu.m, and the logarithmic value of differential intrusion of at least 0.14 cm.sup.3/g at the pore diameter of the maximum.

Inventors: Sakata; Hideo (Ibaraki, JP), Higuchi; Hayato (Ibaraki, JP), Kita; Fusaji (Ibaraki, JP)

Assignee: Hitachi Maxell, Ltd.

International Classification: H01M 4/58 (20060101)

Expiration Date: 1/03/02017