Positive active material for nonaqueous electrolyte secondary battery, transition metal hydroxide precursor, method of producing transition metal hydroxide precursor, method of producing positive active material for nonaqueous electrolyte secondary battery, positive electrode for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery

Abstract

Disclosed is a positive active material for a nonaqueous electrolyte secondary battery containing a lithium transition metal composite oxide, in which the lithium transition metal composite oxide has an α-NaFeOstructure, a molar ratio Li/Me of Li and a transition metal (Me) is 1<Li/Me, Ni and Mn, or Ni, Co, and Mn are included as the transition metals (Me), a molar ratio Mn/Me of Mn and Me is 0.4≤Mn/Me<0.6, when the lithium transition metal composite oxide is pressed at a pressure of 40 MPa, a density is 2.7 g/cmor more, the lithium transition metal composite oxide has an X-ray diffraction pattern attributable to R3-m.