NONAQUEOUS ELECTROLYTE SECONDARY CELL AND POSITIVE ELECTRODE ACTIVE MATERIAL

A positive active material for nonaqueous electrolyte secondary batteries which has a higher capacity and improved thermal stability in a charged state and is less expensive compared to the current active material of LiCoO2 is provided by a lithium compound oxide having the formula: LiaNibCocMndMeO2 where M stands for one or two of W and Mo, 0.90 ≤ a ≤ 1.15, 0