Low-sulfur ternary precursor as well as preparation method and application thereof

The invention provides a low-sulfur ternary precursor as well as a preparation method and application thereof. The preparation method comprises the following steps: performing spray pyrolysis on a first nickel-cobalt-manganese mixed salt solution, then replacing the first nickel-cobalt-manganese mixed salt solution with a second nickel-cobalt-manganese mixed salt solution, and continuing spray pyrolysis to obtain the low-sulfur ternary precursor, wherein the concentration of the first nickel-cobalt-manganese mixed salt solution is different from that of the second nickel-cobalt-manganese mixed salt solution. In the spray pyrolysis process, nickel-cobalt-manganese mixed salt solutions with different concentrations are adopted for reaction, the ternary precursor material with wide particle size distribution is obtained, and the sulfur content is also greatly reduced; by adopting the prepared ternary precursor material with wide particle size distribution, the ternary positive electrode material doped with large