Method for preparing spherical carbonate

The invention discloses a method for preparing spherical carbonate serving as a cell fuel precursor. At present, the preparation of a nickel-cobalt lithium manganate anode material mainly adopts a co-precipitation method, and the obtained materials are generally irregular granules with low practical value. The method is characterized by comprising the following steps of: taking tail ammonium chloride solution as reaction base solution, adding metal chlorate solution and ammonium carbonate into the base solution at the same time with stirring to produce precipitation reaction at the temperature of between 40 and 80 DEG C, ensuring that the pH value of the solution at the end point is between 7.0 and 7.5, preserving heat and ageing the solution, and washing and drying the obtained slurry to obtain a spherical carbonate product, wherein the metal chlorate solution is one or mixture of cobalt chloride, nickel chloride and manganese chloride, and the concentration of the ammonium chloride is 10 to 30 grams per liter. The tail solution is used as the base solution, and the pH value of the solution at the end point is between 7.0 and 7.5 by using the liquid-phase precipitation method so that the spherical carbonate product with large grain diameter is obtained and all indexes are excellent.