Method for preparing carbon-based lithium ion sieve by using waste lithium ion battery as raw material

The invention relates to a method for preparing a carbon-based lithium ion sieve by using a waste lithium ion battery as a raw material; in particular, a waste ternary lithium ion battery negative electrode material is used as a lithium source, a waste ternary lithium ion battery positive electrode material is used as a manganese source, manganese dioxide is plated on a lithium salt-containing negative electrode carbon material through electrolytic oxidation, and post-treatment is carried out to obtain the carbon-based manganese lithium ion sieve with the chemical composition of MnO[2].0.5H[2]O.xC, wherein x is equal to 5-20, the lithium adsorption capacity of the carbon-based manganese lithium ion sieve is 15-30 mg/g, and the manganese solution loss rate of the lithium ion sieve after 10 times of adsorption and desorption cycles is 0.4%-0.8%. The carbon-based manganese lithium ion sieve with high additional value is prepared by comprehensively utilizing low-value manganese in the waste ternary lithium ion ba