Abstract: A single phase cathodic material for use in an electrochemical cell represented by the formula: Li[LixCoyA1−x−y]O2 wherein A=[MnzNi1−z]; wherein x is a numerical value ranging from approximately 0.00 to approximately 0.16; wherein y is a numerical value ranging from approximately 0.1 to approximately 0.30; wherein z is a numerical value ranging from approximately 0.40 to approximately 0.65; and wherein Lix is included in transition metal layers of the structure and/or wherein the material comprises a layered R-3m crystal structure having a c/a ratio greater than approximately 1.012.