NOVELTY - The surface modification of a lithium ion battery organic binder involves carrying out an atomic layer deposition reaction on the surface of polyvinylidene fluoride powder by reacting a first precursor with the vinyl surface chemical groups of the polyvinylidene fluoride powder, then reacting the first precursor vinyl surface exposed groups on the surface of the polyvinylidene fluoride powder with a second precursor to obtain an atomic layer deposition of metal oxide or metal fluoride on the polyvinylidene fluoride powder surface.    USE - The surface modified polyvinylidene fluoride powder is used as a binder for a lithium ion battery.    ADVANTAGE - The electrolyte conductivity and wettability of the binder are improved without changing the adhesive properties, providing lithium-ion batteries with improved stability and charge-discharge cycle performance, enhancing the power characteristics and service life.    DETAILED DESCRIPTION - The surface modification of a lithium ion battery organic binder comprises coating polyvinylidene fluoride powder on the filter of a powder holder. The powder holder is placed in an atomic layer deposition reactor chamber, and the chamber is evacuated. The chamber is heated with an inflow of gas to pre-disperse the polyvinylidene fluoride powder until the temperature reaches 70-165 degrees C. Then, the atomic layer deposition reaction is commenced by:    (a) introducing into the cavity a first mixture of carrier gas and a first precursor to react with vinyl surface chemical groups of the polyvinylidene fluoride powder;    (b) purging the chamber with a cleaning gas;    (c) introducing into the cavity a second precursor or a mixture of second precursor and carrier gas to react with the first precursor vinyl surface exposed groups on the surface of the polyvinylidene fluoride powder; and    (d) purging the chamber with a cleaning gas.    The reaction is completed to obtain an atomic layer deposition of metal oxide or metal fluoride on polyvinylidene fluoride powder surface. The atomic layer deposition reaction cycle is repeated to polyvinylidene fluoride powder coated surface.