Particulate mixture, the active material body, the positive electrode active material, a positive electrode, a secondary battery and a manufacturing method thereof aggregation

The present invention can be provided as a small particle size, low crystallinity particulate mixture of a lithium transition metal silicate-based precursor compound and the like. Also provided silicate containing lithium transition metal-based compound, a cathode active material capable of charge and discharge reaction at room temperature. The particulate mixture is a silicon oxide particles, transition metal oxide particles and a mixture of lithium transition metal silicate particles, characterized in that, in a powder X-ray diffraction measurement, and in the vicinity of 2θ = 35.7 ° near 2θ = 33.1 ° diffraction peaks of the silicon oxide particles and fine particles of the transition metal oxide is amorphous, fine particles of the lithium transition metal silicate is a microcrystalline or amorphous state. Then, the positive electrode active material is an active material to be heat-treated aggregates obtained by pulverizing the resulting particulate mixture.