I. Material systems and basic theory
1.1 Chemical composition and crystal structure of trivalent materials
The crystal structure of the ternary cathode materials (lini _ xCo _ yMn _ zO _ 2 or lini _ xCo _ yAl _ zO _ 2) is a lamellar a-NaFeO _ 2 type, with space group R-3m. Nickel cobalt manganese (aluminum) ions occupy the 3a position, lithium ions occupy the 3b position, and oxygen ions occupy the 6c position. Nickel content directly affects:
