▎ 摘　　要

NOVELTY - Use of graphene quantum dots are claimed as electrolyte additive of zinc ion battery, where the surface of the graphene quantum dot has an electronegative group containing nitrogen, sulfur, and oxygen. USE - Graphene quantum dots used as electrolyte additive of zinc ion battery, e.g. Zn/Zn symmetrical battery (claimed). ADVANTAGE - The graphene quantum dot usedas an electrolyte additive to adsorb zinc ions in an electrolyte solution, which uniformly codeposit on the surface of a negative electrode, and then induce the zinc ions to preferentially deposit along a (002) crystal face parallel to the surface of the electrode, so that the formation of zinc dendrites is fundamentally inhibited. The graphene quantum dots are light in weight, do not affect the energy density of the battery, are stable in performance, do not generate side reactions, and also recycle in the charging and discharging process, to achieve long-time performance improvement. The water-based zinc ion battery with the graphene quantum dots added in the electrolyte can continuously light an LED array, and has a good prospect in zinc ion batteries with high energy density. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: A zinc ion battery electrolyte, which comprises zinc salt and the graphene quantum dots. A zinc ion battery, comprises electrolyte, preferably the zinc ion battery is a Zn/Zn symmetrical battery assembled by using a metal zinc sheet as a negative electrode, a metal zinc sheet as a positive electrode, and a ® glass fiber filter paper as a separator, and dropping the electrolyte, or, the zinc ion battery is a Zn/NVO full battery, which uses a metal zinc sheet as a negative electrode, and sodium vanadium bronze nanowires (Na2V6O16. 1.63H2O) or NVO as a positive electrode, where positive electrode loading is 3-5 mg/cm2, and the N/P ratio is adjusted to 2.5-3 .5, using ® glass fiber filter paper as a diaphragm, and dripping the electrolyte to assemble.WhatmanWhatman