| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolytic solution battery with superior discharge characteristics in spite of using a flame-resistant electrolytic solution. <P>SOLUTION: By using lithium iron phosphate for a positive electrode active material and using the nonaqueous electrolytic solution to contain fluorinated phosphate ester and/or fluorinated chained carbonate having a side chain of the carbon number of ≤3 as a flame-resistant solvent, reduction of discharge capacity is suppressed and in some cases, improved on the contrary, compared with the case of using the nonaqueous electrolytic solution containing no flame-resistant solvents. Accordingly, the nonaqueous electrolytic solution secondary battery which is high in safety and with superior battery characteristics can be supplied. <P>COPYRIGHT: (C)2010,JPO&INPIT |
