Electrolyte for lithium-sulfur battery

The invention relates to an electrolyte for a lithium-sulfur battery, the electrolyte comprises a basic component and an additive, and the additive comprises one or more of terpyridyl ruthenium chloride, terpyridyl cobalt chloride, terpyridyl nickel chloride and terpyridyl ferric chloride. According to the invention, the reaction electrics of the battery can be optimized, the reaction rate is improved, the resistance between the electrode and the electrolyte is reduced, and the capacity, cycle life and rate capability of the battery are improved. The terpyridyl group can be effectively adsorbed on the conductive agent and the carbon material, the conductivity of the whole electrode is improved, the metal element and the chlorine element can effectively adsorb polysulfide and catalyze the conversion reaction of sulfur, the battery capacity is improved, and the shuttle effect of the battery is reduced. 本发明涉及一种锂硫电池用电解液，该电解液包括基础成分和添加剂，所述添加剂包括三联吡啶氯化钌、三联吡啶氯化钴、三联吡啶氯化镍和三联吡啶氯化铁中的一种或多种。本发明能优化电池反应电力学，提高了反应速率，减小电极与电解液间的电