The invention discloses a method for modification of a
lithium ion battery
anode material. The method comprises the following steps of 1, mixing an
organic acid and an
alcohol into an organic solution, 2, adding an
anode material into the organic solution and carrying out mixing to obtain a suspension liquid, 3, carrying out
centrifugal separation and carrying out washing by an
alcohol solvent, and 4, carrying out
drying. The
anode material is a Ni-based
metal-
oxide anode material LiNixM1-xO2, wherein x is greater than or equal to 0.5 and is less than 1 and M represents one or two of Co, Mn, Al, Cr, Mg, Cu, Ti, Mg, Zn, Zr and V. Compared with the prior art, the method utilizes the
mixed solution of the
alcohol and the
organic acid to wash the anode material so that soluble Li salt impurities on the surface of the anode material are removed and a material pH value is obviously reduced. Through low-temperature
drying, the washed anode material is coated with alcohol molecules for blocking air so that the binding of water molecules and the anode material is avoided;
pole piece gluing is prevented; and high-temperature storage performances and cycle stability of a battery are improved obviously. After washing, the
mixed solution of the alcohol and the
organic acid can be recycled and thus a cost is low and
pollution on the environment is avoided.