▎ 摘　　要

NOVELTY - An ultra-thin lithium metal negative electrode preparing method involves mixing a lithium salt, an organic solvent and an additives to obtain solution A, adding graphene quantum dots and polyethylene oxide to solution A, stirring and mixing uniformly to obtain dispersion B, where the content of graphene quantum dots in dispersion B is 0.5-2 mg/mL under the mass ratio of graphene quantum dots and polyethylene oxide is 1: 50-200, utilizing the metal lithium as a working electrode, utilizing the copper electrode as a counter electrode, utilizing the dispersion liquid B as a plating solution, electroplating metal lithium and depositing on the surface of copper electrode to obtain the finished product. USE - Method for preparing ultra-thin lithium metal negative electrode. ADVANTAGE - The method enables preparing ultra-thin lithium metal negative electrode with improved circulation stability, in simple preparation process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing lithium-sulfur full battery, which involves utilizing an ultra-thin lithium metal as a negative electrode, and a carbon/sulfur composite electrode for the positive electrode and assembling a lithium-sulfur full cell with the electrolyte.