The invention relates to a
lithium cobalt oxide positive
electrode material with an O2 phase structure and a preparation method and application thereof, the chemical general formula of the
lithium cobalt oxide positive
electrode material is Li1 + a (CocMd) (1 + a) / (1 + a + b) O2. Xb (CocM'd) b / (1 + a + b) O2,-1 < a < = 0.1, 0 < b < = 1, 0 < c < = 1, 0 < = d < = 0.5,-1 < a + b < = 1.1, X comprises at least one of Na, K, Rb, Cs or B, and M and M'are selected from at least one of Ni, Mn, A l, Mg, Co, Cu, Ca, Zn, Zr, B, Nb, Fe, Cr, Y, La, Ce, Cd or Al; the
space group is P63mc; according to an XRD (X-
Ray Diffraction) test,
diffraction characteristic peaks exist at the same time at the
diffraction angles of 18.3 to 18.9 degrees, 37.9 to 38.4 degrees, 46.7 to 47.3 degrees and 16.0 to 16.5 degrees.