POSITIVE ELECTRODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

A positive electrode active material for a non-aqueous electrolyte secondary battery is provided. The positive electrode active material includes a layer-structured, nickel-containing lithium transition metal complex oxide. The lithium transition metal complex oxide contains titanium and niobium in a chemical composition thereof, and has a ratio of a total number of moles of titanium and niobium relative to a total number of moles of metals excluding lithium in the chemical composition of 0.04 or less.