Method for producing cathode material lithium manganate of lithium battery by dry mixing

The invention discloses a method for producing a lithium battery cathode material lithium manganate by dry mixing, which comprises the following specific steps: step 1, uniformly mixing LiMnO4, manganese dioxide, nano niobium pentoxide, nano aluminum oxide, LiOH powder and diboron trioxide at normal temperature, and grinding to obtain a mixture; 2, powder mixing: stirring and mixing the mixture obtained in the step 1 and polyvinyl alcohol; 3, preparing an acidic solution: heating H20, adding the prepared mixture of absolute ethyl alcohol and concentrated hydrochloric acid, and stirring to prepare the acidic solution; 4, taking out a part of the acidic solution, adding the acidic solution into the powder in the step 2, and mixing to obtain a suspension; 5, adding the residual acidic solution into the suspension liquid in the step 4, heating in a sealed environment for reaction, and cooling the reactant after the reaction is completed to obtain emulsion adhesive coated crystals; 6, sintering and screening the c