Method for preparing quaternary precursor and quaternary positive electrode material through flame spray pyrolysis

The invention relates to a method for preparing a quaternary precursor and a quaternary positive electrode material through flame spray pyrolysis, and the method for preparing the quaternary precursor comprises the following steps: mixing a metal salt solution with a first auxiliary agent and a second auxiliary agent to obtain a mixed solution; atomizing the mixed solution to form atomized liquid drops, and carrying out preheating and flame pyrolysis on the atomized liquid drops to obtain a quaternary precursor; the first auxiliary agent comprises any one or a combination of at least two of urea, citric acid and oxalic acid; and the second auxiliary agent comprises any one or a combination of at least two of ethanol, ethylene glycol or citric acid. By using the first auxiliary agent, the preparation time is shortened, and the crystallinity of the material is improved; by using the second aid, the temperature required by flame pyrolysis is reduced, and energy and reaction cost are saved; and through cooperativ