| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery capable of inhibiting the expansion of a cell due to charge-discharge cycles. <P>SOLUTION: A cell element 10 of the nonaqueous electrolyte secondary battery comprises a positive electrode 11 containing a positive electrode active material, and a negative electrode 12 containing a negative electrode active material. The positive electrode active material contains a spinel-type lithium-nickel-manganese composite oxide having an upper-limit potential of 4.5 V (vs. Li/Li<SP POS="POST">+</SP>) or higher relative to the oxidation-reduction potential of metal lithium. The negative electrode active material contains a lithium-titanium composite oxide. The ratio A/C is 0.6 or lower, where C and A represent the capacities per unit area of the positive electrode and the negative electrode, respectively. <P>COPYRIGHT: (C)2012,JPO&INPIT |
