NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES

摘要

This nonaqueous electrolyte secondary battery, which is provided with a positive electrode, a negative electrode and a nonaqueous electrolyte, is characterized in that: the positive electrode contains, as a positive electrode active material, lithium-containing transition metal oxide particles wherein the main component of the transition metal is nickel; a first compound, which has a composition different from that of the lithium-containing transition metal oxide particles and contains at least one element Ma that is selected from the group consisting of group 4 elements and group 5 elements, is sintered onto a part of the surfaces of the lithium-containing transition metal oxide particles; and the positive electrode additionally contains a second compound which has a composition different from that of the lithium-containing transition metal oxide particles and contains at least one element Mb that is selected from the group consisting of group 6 elements.