The invention discloses a positive
electrode electrolyte suitable for a
lithium-
selenium battery, application of the positive
electrode electrolyte and the
lithium-
selenium battery, and belongs to the field of
lithium-
selenium batteries. The positive
electrode electrolyte comprises a basic electrolyte and
organic molecules, wherein the
organic molecules are 2-
benzothiazole diethyldithiocarbamate, and the concentration of the
organic molecules is 0.1 mol / L to 3 mol / L. According to the preparation method disclosed by the invention, organized molecules and Li2Sen generated in a selenium positive electrode discharging process are subjected to nucleophilic reaction, so that selenium is grafted to an organic framework to realize
organification, and a shuttle effect of Li2Sen is avoided from the source; meanwhile, an organized product is a good lithium
ion conductor, lithium ions can be quickly transferred, and stable circulation of the battery at higher
magnification is realized; besides, the organized product has higher
discharge voltage, the
energy density of the battery is also improved, and the lithium-selenium battery which has
high energy density, can be quickly charged and discharged and has excellent
cycling stability is finally realized, so that the lithium-selenium battery has a wide application prospect.