| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium-ion secondary battery capable of quick charging. <P>SOLUTION: In the lithium-ion secondary battery provided with a negative electrode made of a negative electrode active material capable of inserting/desorbing lithium ion, a positive electrode made of a positive electrode active material capable of inserting/desorbing lithium ion, a porous plastic sheet arranged between the negative electrode and the positive electrode for insulating each electrode from the other, and nonaqueous electrolyte solution containing lithium ion, a ratio A/C of a volume A of lithium which the negative electrode can insert/desorb to a volume C of lithium which the cathode can insert/desorb is to be set at: 1.1≤A/C≤1.6. <P>COPYRIGHT: (C)2008,JPO&INPIT |
