POSITIVE ELECTRODE MATERIAL, POSITIVE ELECTRODE FOR NONAQUEOUS-ELECTROLYTE SECONDARY BATTERY, AND NONAQUEOUS-ELECTROLYTE SECONDARY BATTERY

摘要

A positive electrode material which includes a 6-coordination local structure involving Ni and M1 and is represented by Li2NiαM1 ηM2 βO4-γ (0<α+η≤2, 0≤η<0.5, 0<β≤2, 0≤γ≤1, α+η+β=1 to 2.1, 0.8<β/(α+η), M1 is Mn, and M2 is Ge and/or Sn). The positive electrode material is used in a positive electrode (14) for nonaqueous-electrolyte secondary batteries and in a nonaqueous-electrolyte secondary battery (1).