Lithium-sulfur (Li-S) batteries are anticipated as one of the most promising candidates for the high-energy-density storage systems. However, the insulating nature and shuttling effect of sulfur severely limits their performance. The incorporation of sulfur with carbon materials has been deemed as one of the most powerful strategies to improve electrical conductivity and suppress soluble polysulfide shuttling. Herein, a novel three-dimensional carbon framework (3DCF) is prepared and employed as a sulfur host (3DCF@S) for Li-S batteries. The 3DCF not only supplies abundant paths for lithium ion diffusion and electron transport, but also strengthens polysulfide immobilization during the lithium/sulfur conversion reactions. As a result, the 3DCF@S with high sulfur content of 90% exhibits a high capacity of 1366 mA h/g at 0.1 C and excellent cycling stability with a satisfactory capacity of 601 mA h/g after 600 cycles at 2.0 C. The resultant Li-S button battery based 3DCF@S electrode could power a light-emitting diode for 2 h. The acquired 3DCF@S is expected to be widely used in Li-S batteries and this study will promote developments of carbon/sulfur composites for Li-S batteries.

锂硫（Li-S）电池有望成为高能量密度存储系统最有希望的候选者之一。然而，硫的绝缘性质和穿梭效应严重限制了它们的性能。将硫与碳材料结合已被认为是提高电导率和抑制可溶性多硫化物穿梭的最有效策略之一。在此，制备了新颖的三维碳骨架（3DCF），并用作Li-S电池的硫主体（3DCF @ S）。3DCF不仅为锂离子扩散和电子传输提供了丰富的路径，而且在锂/硫转化反应过程中加强了多硫化物的固定。结果，硫含量高达90％的3DCF @ S在0时表现出1366 mA h / g的高容量。1 C和出色的循环稳定性，在2.0 C下经过600次循环后，其令人满意的容量为601 mA h / g。所得的基于Li-S纽扣电池的3DCF @ S电极可以为发光二极管供电2 h。预计所收购的3DCF @ S将广泛用于Li-S电池，这项研究将促进Li-S电池的碳/硫复合材料的发展。