Lithium manganese compound oxide and non-aqueous electrolyte secondary battery

The present invention provides a lithium manganese oxide, wherein a content of sulfur is not more than 0.32 % by weight, and an averaged diameter of pores is not less than 120 nanometers, and the lithium manganese oxide is represented by Li1+xMn2-x-yMyO4 , where "M" is at least one of metals and 0.032