Abstract Melt-diffusion and vapor-phase infusion is widely used to introduce sulfur into the pores of carbon matrix to improve the performance of lithium-sulfur (Li-S) batteries. However, it is limited performance enhancement due to low sulfur content and unavoidable land on the outer surface of host material. Herein, we introduce an effective and facile strategy to prepare an urchin-like S@N-doped carbon composite by in situ oxidizing the N-carbon coated metal sulfide precursor. The prepared urchin-like S@N-doped carbon particle cathode for lithium-sulfur batteries exhibits a high initial capacity of 820 mAh−1 and excellent cycling performance of 760 mAh−1 after 100 cycles at 0.5 C with a high mass sulfur loading (78.9 wt%, 3.5 mAh cm−2). This work provides an efficient route to prepare sulfur/porous carbons for energy storage application.

中文翻译：

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将硫限制在用于锂硫电池的类海胆氮掺杂碳颗粒中

摘要 熔体扩散和气相灌注被广泛用于将硫引入碳基体的孔隙中，以提高锂硫（Li-S）电池的性能。然而，由于低硫含量和不可避免的在主体材料外表面上的着陆，它的性能增强有限。在此，我们介绍了一种有效且简便的策略，通过原位氧化 N 碳包覆的金属硫化物前驱体来制备类似海胆的 S@N 掺杂碳复合材料。所制备的用于锂硫电池的类海胆状 S@N 掺杂碳颗粒正极具有 820 mAh-1 的高初始容量和 760 mAh-1 的优异循环性能，在 0.5 C 和高质量硫负载下循环 100 次后（ 78.9 wt%, 3.5 mAh cm−2)。这项工作为制备用于储能应用的硫/多孔碳提供了一种有效的途径。