Elemental sulfur is one of the most attractive cathode active materials in lithium batteries because of its high theoretical specific capacity. Despite the positive aspect, lithium–sulfur batteries have suffered from severe capacity fading and limited rate capability. Here we report facile large-scale synthesis of a class of organosulfur compounds that could open a new chapter in designing cathode materials to advance lithium–sulfur battery technologies. Porous trithiocyanuric acid crystals are synthesized for use as a soft template, where the ring-opening polymerization of elemental sulfur takes place along the thiol surfaces to create three-dimensionally interconnected sulfur-rich phases. Our lithium–sulfur cells display discharge capacity of 945 mAh g−1 after 100 cycles at 0.2 C with high-capacity retention of 92%, as well as lifetimes of 450 cycles. Particularly, the organized amine groups in the crystals increase Li+-ion transfer rate, affording a rate performance of 1210, mAh g−1 at 0.1 C and 730 mAh g−1 at 5 C.
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机译：元素硫由于其高的理论比容量而成为锂电池中最有吸引力的阴极活性材料之一。尽管存在积极的方面，但锂硫电池却遭受了严重的容量衰减和速率限制功能。在这里，我们报告了一类有机硫化合物的简便大规模合成，这可能会在设计正极材料以推进锂硫电池技术方面掀开新的篇章。合成多孔三硫氰尿酸晶体用作软模板，其中元素硫的开环聚合沿硫醇表面发生，从而形成三维互连的富硫相。我们的锂硫电池在0.2 C下循环100次后，放电容量为945 mAh g -1 ，高容量保持率为92％，寿命为450次循环。特别是，晶体中的有序胺基提高了Li + 离子的转移速率，在0.1 C和730 mAh g 的条件下提供了1210的速率性能，mAh g -1 。 sup> -1 在5°C。
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