| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensive nonaqueous secondary battery having a high safety using a specified nonwoven fabric or a paper as a separator. <P>SOLUTION: This is the nonaqueous secondary battery in which a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte containing a lithium salt are housed in a battery container, the thickness of the battery of a flat shape is less than 12 mm, its energy capacity is 30 Wh or more, and its volume energy density is 180 Wh/l or more, the separator is made of the nonwoven fabric or the paper having a thickness of 50 μm or less and 20 μm or more and air permeation of 20 sec/100 cc or more and 200 sec/100 cc or less. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
