Modification method for recovering graphite from lithium ion battery and modified graphite, negative electrode material and lithium ion battery. Modification methods include: lithium ion battery recycled graphite and metal powder mixed grinding to obtain the first mixture; The first mixture was roasted at low temperature to obtain the second mixture. The second mixture was separated, washed, PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC and dried after contact with acid solution to obtain modified graphite.
The modified phenolic resin is carbonized by heating the graphite particles attached to the resin in a non-oxidizing gas atmosphere at 900 ~ 1500℃, and at least part of the surface of the graphite particles is covered with a carbon coating. Among the aryl groups of modified phenolic varnish phenolic resin, 5 ~ 95 mole % are aryl groups with hydroxyl groups.
The degree of graphitization and crystallinity of the modified graphite obtained by modification are high. The graphite particles attached to the modified phenolic resin varnish were obtained by attaching the phenolic resin to the graphite particles. PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC The carbon coated graphite particles obtained by removing iron can be used as the negative electrode material of lithium ion secondary batteries.
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