| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous secondary battery that has excellent overcharge safety and can secure storage reliability because gas hardly occurs at high temperature storage. <P>SOLUTION: The nonaqueous secondary battery comprises a positive electrode 1, a negative electrode 2, a nonaqueous electrolyte solution, and a separator 3. The nonaqueous electrolyte solution contains a compound A in which a halogen group is bonded to a benzene ring, and a compound B which is oxidized at a lower potential than that of the compound A. The compound B is at least one type selected from aromatic compounds and heterocyclic compounds. Air permeability of the separator 3 is 200 s/100 cm<SP>3</SP>to 500 s/100 cm<SP>3</SP>. The portable device is provided with the secondary battery. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
