| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium-ion secondary battery with excellent durability, with a capacity hardly being reduced, and with inner resistance hardly increased. <P>SOLUTION: The Li-ion secondary battery is provided with a cathode, an anode, and nonaqueous electrolyte solution with an electrolyte dissolved in a nonaqueous solvent. The nonaqueous electrolyte solution contains one kind or more of main electrolytes selected from LiPF<SB>6</SB>, LiClO<SB>4</SB>, LiBF<SB>4</SB>, LiAsF<SB>6</SB>, and LiSbF<SB>6</SB>as the electrolyte, and a first sub electrolyte with A<SP>a+</SP>as Li<SP>+</SP>, a second sub electrolyte with A<SP>a+</SP>as K<SP>+</SP>, and/or a third sub-electrolyte with A<SP>a+</SP>as Na<SP>+</SP>expressed in a general formula (1). The nonaqueous solvent contains 0.1 wt.% to 20 wt.% of vinylene carbonate and/or vinylene ethylene carbonate. <P>COPYRIGHT: (C)2009,JPO&INPIT |
