オリビン型シリケート化合物の製造法、及び二次電池正極活物質の製造法

Japanese Patent JP5759968

B2

PROBLEM TO BE SOLVED: To provide a secondary battery positive electrode active material causing no deterioration in discharge capacity even after repeated charging and discharging, and a method for producing the secondary battery positive electrode active material.SOLUTION: An olivine type lithium silicate compound in which a part of lithium is substituted with a metal element X, Y or Z is represented by the following formula (1): LiXYZMSiO...(1) (in the formula (1), X is a metal in a +2 oxidization state and represents a metal selected from among Mg, V, Co, Zr, Ca, Sr, Baand Zn, Y is a metal in a +3 oxidation state and represents a metal selected from among Al, Vand Zr, Z is a metal in +4 oxidation state and represents a metal selected from Vand Zr, M represents one or two or more metals selected from among Fe, Ni, Co, Al, Zn, Mn, V and Zr, and 0