▎ 摘　　要

NOVELTY - Lithium battery coating type metal lithium cathode material is prepared by wet grinding lithium scrap under protection of argon gas, grinding and drying, and then sealing to obtain lithium powder with high active surface. The graphene micro-sheet functionalized with amino is added into ball mill under protection of argon gas for obtaining composite particles of lithium nitride/metal lithium/amino graphene. The argon gas is changed into the mixed gas for ball milling again to obtain the lithium battery coated metal lithium negative electrode material. USE - Lithium battery coated metal lithium cathode material. ADVANTAGE - The material has good stability, simple preparation process, good coating effect and wide application prospect, and improves transport capability of lithium ion, inhibits lithium dendritic crystal deposition and improves cycle performance of metal lithium. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing lithium battery coated metallic lithium negative electrode material, which involves: (A) adding lithium scraps into a grinding bowl for carrying out wet grinding in an argon-protected glove box to remove an oxide film on the surface layer; (B) collecting obtained powder after drying; (C) putting into a vacuum bag for sealing to realize pretreatment of lithium and obtain lithium powder with a high-activity surface; (D) adding the obtained lithium powder with the high-activity surface and the amino functionalized graphene microchip into a ball mill; (E) carrying out ball milling for 2-3 hours under argon protection; (F) replacing air source with mixed gas of argon/nitrogen for 1-2 hours to obtain composite particles of lithium nitride/metallic lithium/amino graphene; (G) adding aluminum powder and copper powder into the ball mill; (H) replacing the air source with argon; (I) carrying out ball milling for 8-24 hours; and (J) collecting to obtain the lithium battery coated metallic lithium cathode material.