| 摘要 |
A method for producing a lithium ion secondary battery comprising the positive electrode active material of formula (1), Li(2-0.5x)Mn1-xM1.5xO3 (x satisfies 0<x<1) . . . (1) (M in the formula is a lithium-containing transition metal oxide expressed by NiaCobMncM1d (in which 0<a≦0.5, 0≦b≦0.33, 0<c≦0.5, and 0≦d≦0.1 are satisfied, the sum of a, b, c, and d becomes 1, and M1 in the formula is an element selected from Li, V, Al, Zr, Ti, Nb, Fe, Cu, Cr, Mg, and Zn)). The method comprises a step to repeat charge-discharge multiple times (charge-discharge interval), and comprises a step to discharge a at a lower current density than the current density during charge a, during the discharge of the multiple charges-discharges, or, a step to discharge b at a lower current density than the current density during charge a after the electromotive force is naturally recovered by idle b after each charge-discharge. |
| 主权项 |
1. A method for producing a lithium ion secondary battery comprising a solid solution positive electrode active material represented by the following composition formula:
Li(2-0.5x)Mn1-xM1.5xO3 wherein x satisfies 0<x<1 and M is a lithium-containing transition metal oxide expressed by NiaCobMncM1d wherein 0<a≦0.5, 0≦b≦0.33, 0<c≦0.5, and 0≦d≦0.1 are satisfied, the sum of a, b, c, and d becomes 1, and M1 is an element selected from Li, Al, Zr, Ti, and Nb, the method comprising: repeatedly charging and discharging the lithium ion secondary battery; and the discharging of the lithium ion secondary battery being carried out at a lower current density than a current density during the charging of the lithium ion secondary battery, during each of the charging and discharging. |
