Method for reducing surface alkali content of lithium battery positive electrode material

A method for reducing the surface alkali content of a lithium battery positive electrode material comprises the following steps: 1, adding sodium hydroxide after a coprecipitation reaction is finished, adjusting the pH value, aging, and carrying out filter pressing to remove mother liquor; 2, performing circulating water washing on the precursor, and controlling moisture; 3, adding pure water into an aging kettle, starting stirring, adding the precursor into the aging kettle, adding acid to adjust the pH value, adding citric acid, and aging; 4, carrying out filter pressing on the slurry in the aging kettle to remove mother liquor, carrying out cyclic alkali washing, and controlling moisture; 5, carrying out circulating washing on the obtained precursor, and controlling the moisture; and 6, drying, sieving and deironing the obtained precursor to obtain a precursor product, uniformly mixing the precursor product with a lithium source, and calcining to obtain the lithium battery positive electrode material. Comp