Dissolved polysulfides cause high self-discharge, low coulombic efficiency and short cycling life due to their shuttle effect in the charge/discharge cycles in lithium-sulfur (Li-S) batteries. Despite of various attempts (e.g., addition of metal oxides and chalcogenides in the cathode, immobilization of sulfur with various carbons, and confinement of sulfur within the cathode side with membranes) in solving this problem, it still remains a major challenge for Li-S batteries. Here, we demonstrate that chemically active binders can in situ bond to the polysulfides in the electrode. Besides the common binding functions of the cathode materials to the current collector, the covalent bonding between binders and polysulfides could bestow the higher capacity, stable cycling and high coulombic efficiency, even under the high loading of sulfur contents. Thus, this study provides an alternative and effective way in solving the shuttle effect of the dissolved lithium polysulfides for Li-S batteries.

溶解的多硫化物由于在锂硫（Li-S）电池的充电/放电循环中存在穿梭效应，因此导致高自放电，低库仑效率和较短的循环寿命。尽管为解决该问题进行了各种尝试（例如，在阴极中添加金属氧化物和硫属元素化物，将硫与各种碳固定化以及在阴极侧将硫限制在膜内），但对于Li-S仍然是一项重大挑战电池。在这里，我们证明了化学活性粘合剂可以原位键合到电极中的多硫化物上。除了阴极材料与集电器的常见粘合功能外，即使在硫含量高的情况下，粘合剂与多硫化物之间的共价键合也可以提供更高的容量，稳定的循环和高库仑效率。