| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydrocarbon-based solvent which is easily impregnated into a binder. <P>SOLUTION: In a lithium ion secondary battery having at least one single-cell layer, wherein a cathode with a cathode active material layer formed on the surface of a current collector, an electrolyte layer, and an anode with an anode active material layer formed on the surface of the current collector are laminated in this order, at least either the cathode active material layer or the anode active-material layer contains a binder containing a repeating unit, expressed by general formula (1). In the formula (1), X<SB>1</SB>to X<SB>4</SB>are hydrogen or fluorine, and at least one among X<SB>1</SB>to X<SB>4</SB>is fluorine; and at least either the cathode active material layer or the anode active material layer has an electrolytic solution that contains a cyclic hydrocarbon compound of which at least one of substituents has fluorine. <P>COPYRIGHT: (C)2010,JPO&INPIT |
