The invention relates to the field of
lithium ion battery positive
electrode materials, and discloses a positive
electrode material and a preparation method and application thereof. The average particle size d50 and the particle size standard deviation dsigma of primary particles of the positive
electrode material meet the following conditions: d50 is less than or equal to 40 microns, dsigma is greater than or equal to 0.25 microns, and 0.7 < = d50 / dsigma < = 120; the
chemical formula of the positive
electrode material is LiaNibCocMndMeOfJj, in the formula, 0.8 < = a < = 1.2, 0 < b < 1, 0 < c < 0.5, 0 < d < 0.5, 0 < e < 0.4, 1 < = f < 2, 0 < j < = 1, a + b + c + d + e = 2, and f + j = 2; wherein M is selected from at least one element of Ti, Zr, Nb, W, Al, Mg, V, Ca, Sr, Cr, Fe, Ga, In, Mo, Y, Sn, Cu, Ag, Zn, Na and Ba; j is selected from at least one element of S, Si, F and Cl. The positive
electrode material provided by the invention is good in compaction performance, and the
lithium ion battery prepared from the positive
electrode material has relatively high first
discharge specific capacity and cycle capacity
retention rate.