| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrolytic solution which can be used in a secondary battery while containing lactones, e.g. γ-butyrolactone, γ-valerolactone, and/or cyclic carbonates having a branch chain, e.g. propylene carbonate, butylene carbonate, and has excellent cycle life characteristics, and to provide a gel electrolyte using the electrolytic solution, and a lithium ion secondary battery using the electrolytic solution or the gel electrolyte. <P>SOLUTION: <1>In the electrolytic solution, an organic lithium salt or an inorganic lithium salt containing (C) chlorine, fluorine or boron, (A) a lithium salt of organic acid and (B) a boron compound not corresponding to the organic lithium salt are compounded with a nonaqueous solvent containing the lactones and/or the cyclic carbonates having a branch chain.<2>In the electrolytic solution, (A) the lithium salt of organic acid contains one kind or more selected from a group consisting of lithium salts of 1-6C aliphatic carboxylic acid and 7-8C aromatic carboxylic acid. <P>COPYRIGHT: (C)2013,JPO&INPIT |
