| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery which is of high capacity and high output yet can keep high output for a long time. SOLUTION: The cylindrical lithium ion battery 20 has a group of electrodes with positive electrodes, negative electrodes and separators wound around, a connecting part for connecting the group of electrodes with each electrode terminal, and a nonaqueous electrolyte solution. As a positive electrode active substance, lithium manganate which has dissolution volume of manganese into nonaqueous electrolyte solution of not less than 5% in a lithium manganate standard at a region where electrode potential against metal lithium is not less than 4.8 V, and as a negative electrode active substance, graphite is used which can store and release lithium ion by charging and discharging. |
