| 摘要 |
In a lithium ion battery having a discharge capacity of 30 Ah or more and 125 Ah or less, the positive electrode composite has the following configuration: The positive electrode composite contains a mixed active material of layered lithium nickel manganese cobalt composite oxide (NMC) and olivine lithium iron phosphate (LFP), a density of the positive electrode composite is 2.0 g/cm3 or more and 2.6 g/cm3 or less, and an application quantity of the positive electrode composite is 100 g/m2 or more and 200 g/m2 or less. Furthermore, a weight ratio (NMC/LFP) of the mixed active materials is set to 10/90 or more and 60/40 or less. Alternatively, when a discharge capacity is defined as X and the weight ratio is defined as Y, the relation of Y<−0.0067X+1.84 (30≦̸X≦̸125) is satisfied. |
