However , the insulating nature of sulfur and polysulfides and the loss of polysulfides in the liquid organic electrolyte make lithium - sulfur batteries have very low positive active material utilization and poor cyclability 但是單質硫及其放電產物導電性差,易溶于有機溶劑,使得鋰-硫電池正極活性物質利用率低、循環(huán)性能差等。