| 摘要 |
PURPOSE: A positive electrode composite for a secondary battery is provided to have high solid phase in slurry, to minimize cracks at manufacturing electrode, and to improve processability. CONSTITUTION: A positive electrode composite comprises a positive electrode active material as a lithium iron phosphorous oxide of an olivine crystal structure in which carbon is coated, and having a composition in chemical formula 1: (1-x)Li_(1+a)Fe_(1-y)M_y(PO_(4-z))Az_xC in chemical formula 1. The positive electrode active material comprises a hydrophilic conductive material, and has an average particle diameter of primary particles of 2 micron or less. In chemical formula 1, M is one or more kinds selected from Al, Mg, Ni, Co, Mn, Ti, Ga, Cu, V, Nb, Zr, Ce, In, Zn and Y,A is one or more kinds selected from F, S, and N, and 0<x<=0.2, -0.5<=a<=+0.5, 0<=y<=0.5, 0<=z<=0.1. |
