Lithium ion positive electrode material with low impedance and high-rate cycle and preparation method thereof

The invention discloses a lithium ion positive electrode material with low impedance and high-rate cycle and a preparation method thereof. The general formula of the positive electrode material is Li < x > Ni < a > M < b > N < c > O < 2 >. Wherein M is at least one of Mn, Co, Al, Zr, Ti, Mg and other elements; n is at least one of Zr, Ti, Mg, Mo, Nb, La, Al, Sr and other elements; wherein 0.9 < = x < = 1.5, 0 < a < = 1, 0 < b < = 1, a + b = 1, and 0 < c < = 0.05. The preparation process of the positive electrode material is short in process, the technologies of precursor nano-targeting regulation and control pore-forming, wet-process uniform lithium mixing, spray high-temperature oxidation, high-temperature dynamic sintering and the like are innovatively used, and the prepared positive electrode material has the characteristics of low residual alkali, low impedance, high multiplying power, excellent low-temperature and cycle performance and the like; the cylindrical high-magnification lithium ion battery is s