POSITIVE ELECTRODE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR PRODUCING THE SAME, POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY

摘要

The invention is to provide a positive-electrode active material for lithium secondary batteries which, when used as a positive-electrode material for lithium secondary batteries, is capable of attaining a cost reduction and a high capacity and is capable of achieving a lithium secondary battery having high safety and excellent performances. The invention relates to: a lithium-transition metal compound powder for a positive-electrode material of lithium secondary batteries, which is a powder that comprises a lithium-transition metal compound having a function of being capable of an insertion and elimination of lithium ions, wherein the particles in the powder contain, in the inner part thereof, a compound that, when analyzed by an SEM-EDX method, has peaks derived from at least one element selected from the Group-16 elements belonging to the third or later periods of the periodic table and at least one element selected from the Group-5 to Group-7 elements belonging to the fifth and sixth periods of the periodic table; a process for producing the powder; a positive electrode for lithium secondary batteries; and a lithium secondary battery.