| abstract |
Provided is a spinel-type lithium metal composite oxide that can exhibit excellent high-temperature storage characteristics when used as a positive electrode active material of a lithium battery. The oxygen site occupancy (OCC) determined by the Rietveld method is 0.965 to 1.000, and the lattice strain determined by the Williamson-Hall method is 0.015 to 0.090, preferably 0.020 to 0.090, and the ratio of the molar amount of Na to the molar amount of Mn (Na / Mn) is 0.00 <Na / Mn <1.00 × 10 −2, and the crystallite size Is a spinel type (Fd-3m) lithium metal composite oxide having a thickness of 100 to 250 nm. General formula: Li1 + xM2-xO4 (where M is one or more elements selected from Mn, Al, Mg, Ca, Ti, Ba, Cr, Fe, Co, Ni, Cu, or Zn; x is 0.01-0. 09), a spinel-type lithium metal composite oxide. [Selection figure] None |