Patent ID: 8142934

Claim:
A positive electrode for a non-aqueous electrolytic secondary cell comprising a positive electrode active material including a mixture of olivine lithium manganese phosphate and spinel lithium manganate; wherein the olivine lithium manganese phosphate is at least one compound selected from the compounds represented by the general formula LiM1 x Mn 1-x PO 4 , where x denotes a substituted amount in a range of 0≦x≦0.3, and where M1 is at least one metal element selected from the group consisting of Li, Ni, Mg, Zn, Co, Cr, Al, B, V, Si, Sn, Nb, Ta, Cu, Mo and W; wherein the spinel lithium manganate is at least one compound selected from the compounds represented by the general formula LiM2 x Mn 2-x O 4 , where M2 is at least one metal element selected from the group consisting of Li, Fe, Ni, Mg, Zn, Co, Cr, Al, B, V, Si, Sn, Nb, Ta, Cu, Mo, Ti, and W, and where x denotes a substituted amount and is within a range of 0≦x≦0.3; wherein x=0 in one of the olivine lithium manganese phosphate and the spinel lithium manganese when x is greater than 0 in the other one of the olivine lithium manganese phosphate and the spinel lithium manganese; and wherein a mixed ratio of the olivine lithium manganese phosphate in the positive electrode active material is in a range of 10 to 90 mass %.