▎ 摘　　要

NOVELTY - Preparation of lithium ion negative electrode sheet involves adding an aqueous solution of glucose to a hydrothermal reactor, hydrothermally reacting, naturally cooling, centrifuging, adjusting pH to 7, drying, calcining, obtaining solid carbon ball, dispersing graphene oxide in deionized water, adding ascorbic acid and solid carbon ball, mixing, transferring to a high-pressure reactor, hydrothermally reacting at 160-240 degrees C for 6-24 hours, centrifuging, drying, reacting at 300-500 degrees C for 1-2 hours and 600-800 degrees C for 1-2 hours, grinding with a binder for 30-50 seconds, adding N-methylpyrrolidone solvent, slurrying, coating resultant on a copper foil, vacuum-drying, and shaping to sheet having diameter of 16 mm. USE - Preparation of negative electrode sheet used for manufacturing lithium ion battery (claimed). ADVANTAGE - The method enables preparation of negative electrode sheet having excellent electroconductivity and suppressed generation of agglomeration. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacture of button-type lithium ion battery.