▎ 摘　　要

NOVELTY - Preparing water-soluble reduced graphene involves providing graphene oxide, and dispersing the graphene oxide in water to form graphene oxide dispersion having a concentration of less than or equal to 2g/l, and an oxygen element mass fraction in the graphene oxide 25-45%. A reduction reaction is carried out by adding a cation having a cation of plus 1 to obtain graphene oxide dispersion, and the mass ratio of the sulfuric acid salt to the graphene oxide to be added is (0.5-20):1. USE - Method for preparing water-soluble reduced graphene for preparing lithium sulfur battery electrode material (claimed).