▎ 摘　　要

NOVELTY - A graphene quantum dot modified electrolyte comprises a lithium salt, an organic solvent, an additive, a graphene quantum dots and a polymer, where 0.5-1 mol/L lithium salt, 1.5-2 wt.% additive, 0.5-2 mg/mL graphene quantum dots and 25-100 mg/mL polymer. USE - Graphene quantum dot modified electrolyte for use in lithium metal battery (claimed). ADVANTAGE - The graphene quantum dot modified electrolyte has better charging and discharging performance, high current and capacity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing graphene quantum dot modified electrolyte, which involves mixing a lithium salt, an organic solvent and an additive to obtain a mixed solution A under the concentration of the lithium salt is 0.5-1 mol/L, adding graphene quantum dots to the mixed solution A and stirring to obtain a dispersion liquid B under the content of graphene quantum dots in the dispersion liquid B is 0.5-2 mg/mL, adding the polymer to the dispersion liquid B and stirring to obtain the finished product.