The invention discloses a method for preparing a
ternary complex anode material (LiNixCoyMn1-x-yO2), which is characterized in that the
lithium ion battery
anode material (LiNixCoyMn1-x-yO2) is prepared by adopting a
coprecipitation-
silicon cladding-high temperature
sintering-desilicication integrated method, and specifically comprises the following steps: mixing a
nickel source and a
cobalt source with a
manganese source according to
molar ratio of
nickel-
cobalt-
manganese: x:y:(1-x-y), adding with water, stirring to form a solution, adding with a certain amount of
ammonia water and a
sodium hydroxide solution to generate a uniform NixCoyMn1-x-y(OH)2 ocyhydrate precursor, washing and filtering the precursor, adding with a certain amount of
polyvinylpyrrolidone, stirring for a certain period, adding with a certain quantity of
organosilicon reagents, stirring continuously to obtain an ocyhydrate precursor wrapped by
organosilicon reagent-
polyvinylpyrrolidone, washing, filtering,
drying and then mixing the ocyhydrate precursor with a
lithium source, calcining the mixture under air or an
oxygen atmosphere under the temperature of 450-950 DEG C for 2-48 hours, and removing a
silicon wrapping layer on a product by the utilizing a
sodium hydroxide solution, thus obtaining the nanoscale or standard nanoscale
lithium ion battery
ternary complex anode material (LiNixCoyMn1-x-yO2). The particle size of the anode material prepared by the invention ranges from 80nm-180nm, the initial charging / discharging performance achieves 194.4-210.3mAh / g, and the electrochemical performance is excellent.