Cathode material and battery

A battery comprising:

• a cathode;
• an anode;
• and
• an electrolyte,
• wherein the cathode contains a first cathode active material, a second cathode active material, and a third cathode active material,
• the first cathode active material is a complex oxide containing lithium (Li), manganese (Mn), nickel (Ni), and cobalt (Co),
• the second cathode active material is a complex oxide containing lithium and at least one of nickel and cobalt,
• the third cathode active material is at least one of a complex oxide containing lithium and manganese and having a spinel structure and a phosphorus oxide containing lithium and iron (Fe), and
• a ratio by the weight ratio of the cathode active materials is a value in the range obtained by joining each dot of A, B, C, and D expressed in Mathematical formula 1, where the first cathode active material is x, the second cathode active material is y, and the third cathode active material is z in a ternary diagram with the apexes set to each cathode active material.
• A(x, y, z)=(0.76, 0.04, 0.20) (Mathematical formula 1)
• B(x, y, z)=(0.94, 0.05, 0.01)
• C(x, y, z)=(0.05, 0.94, 0.01)
• D(x, y, z)=(0.04, 0.76, 0.20)