Lithium-sulfur (Li-S) batteries, which employ sulfur as cathode and metallic lithium as anode materials, have been widely nominated as one of the most promising next-generation electrochemical storage systems due to its low cost and high theoretical capacity. However, dissolution of its lithiated product (lithium polysulfides) into the electrolyte limits the practical application of lithium sulfur batteries, eventually resulting in poor cycle performance and other drawbacks, such as rapid capacity fading.