| abstract |
(57) [Summary] [PROBLEMS] To provide a non-aqueous secondary battery having high capacity, excellent cycleability and safety. SOLUTION: The negative electrode material has previously stored lithium ions before activation, and the weight of the negative electrode material, the amount of lithium previously stored, and the weight of the positive electrode material are represented by the following relational expressions. Non-aqueous secondary battery. (C + B) /A=4.8 to 7.8, and C / A = 2.1 to 4.0 A: Weight of negative electrode material B: Weight of previously inserted lithium ion converted to lithium x 3862 mAH (capacity per 1 g of lithium) / capacity per 1 g of positive electrode active material (mAh) C: Positive electrode Active material weight |