| abstract |
PROBLEM TO BE SOLVED: To provide a non-aqueous electrolyte secondary battery which is inexpensive and has good cycle characteristics, especially when used at high temperatures. SOLUTION: In a non-aqueous electrolyte secondary battery utilizing insertion and extraction of lithium, a composition formula of Li 1 + x Mn 2-x O 4 (x > 0) a positive electrode formed by using a lithium manganese composite oxide having a spinel structure as a positive electrode active material and binding the lithium manganese composite oxide with a positive electrode binder, and carbon capable of occluding and releasing lithium. A material as a negative electrode active material, and a negative electrode formed by binding the carbon material with a negative electrode binder, The capacity ratio between the positive electrode and the negative electrode (saturated capacity of the negative electrode / saturated capacity of the positive electrode) is configured to be 0.8 or more and less than 1.0. |