▎ 摘　　要

NOVELTY - Lithium ion battery lithium metasilicate-doped graphene cathode material is prepared by adding silicon powder and graphite oxide mixture into ethanol aqueous solution containing lithium hydroxide, hydrothermally synthesizing into lithium metasilicate (Li2SiO3)/graphene (GE) precursor, and sintering under the protection of argon gas to obtain the product. USE - Lithium ion battery lithium metasilicate-doped graphene cathode material. ADVANTAGE - The lithium ion battery lithium metasilicate-doped graphene cathode material improves the battery specific capacity and cycle performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of lithium ion battery lithium metasilicate-doped graphene cathode material comprising mixing silicon powder and graphite oxide to obtain silicon powder and graphite oxide mixture, where content of graphite oxide in silicon powder and graphite oxide mixture is 0.5-40 mass%, adding the silicon powder and graphite oxide mixture into lithium hydroxide ethanol aqueous solution, where the mol ratio of lithium hydroxide and silicon powder is 2:1, obtaining reaction mixture, adding the reaction mixture in PTFE-lined stainless steel reaction kettle, performing hydrothermal reaction at 160-200 degrees C for 16-24 hours, filtering, taking the solid, washing, oven drying at 50-80 degrees C, obtaining Li2SiO3/GE precursor, sintering in argon atmosphere at 500-600 degrees C for 3-4 hours, and obtaining the product.