| 摘要 |
This positive electrode for lithium ion secondary batteries comprises: a lithium metal oxide having a layered rock salt structure and containing nickel, cobalt and manganese; and a phosphate carbon composite which is composed of an olivine-type phosphate compound that is at least partially covered by carbon. The ratio of the volume resistivity of the phosphate carbon composite to the volume resistivity of the lithium metal oxide is 0.034 or less. The olivine-type phosphate compound is represented by general formula LiMhPO4 (wherein M represents at least one element selected from among Mn, Fe, Co, Ni, Cu, Mg, Zn, V, Ca, Sr, Ba, Ti, Al, Si, B, Te and Mo, and 0 < h < 2). The content of the phosphate carbon composite is from 15% by mass to 35% by mass (inclusive) when the total mass of the lithium metal oxide and the phosphate carbon composite is taken as 100% by mass. |
