Lithium‑sulfur (LiS) batteries are promising battery systems that provide high capacity and energy density using abundant materials, but they have a significant drawback known as the shuttle effect, which restricts their capacity, increases their internal resistance, and results in poor cyclability. Therefore, several efforts are being focused on overcoming this drawback, including the development of novel cathode materials based on carbonaceous hosts to adsorb lithium polysulfides (LiPS) and inhibit the shuttle effect, which is a challenging task. In this context, this study investigates the use of silicon oxycarbide (SiOC) as the sulfur host for LiS systems with outstanding electrochemical performance. SiOC powder has been synthesized by pyrolysis process at 800 °C, using 1,3,5-trivinyl-1,1,3,5,5-pentamethyltrisiloxane (TPTS) as the precursor. The sulfur loading procedure consists of a melt-diffusion process conducted at 150 °C, which successfully diffused sulfur into the SiOC porous structure. Then, the S-SiOC composite material morphology and structure have been investigated by several techniques, which confirmed the efficacy of the sulfur loading process. The S-SiOC composite cathode provides a stable capacity, presenting a reversible charge capacity of 711 mAh g_s⁻¹ (≈ 50.3 % of its initial capacity) after 50 cycles at a current density of 83.75 mA g_s⁻¹ (0.05C, considering 1C = 1675 mA g_s⁻¹), indicating that this composite is a promising material for LiS batteries.

锂硫（Li S）电池是一种很有前途的电池系统，可以使用丰富的材料提供高容量和能量密度，但它们有一个显着的缺点，即穿梭效应，这限制了它们的容量，增加了它们的内阻，并导致循环性能差。因此，人们正在努力克服这一缺点，包括开发基于碳质主体的新型正极材料来吸附多硫化锂（LiPS）并抑制穿梭效应，这是一项具有挑战性的任务。在此背景下，本研究研究了使用碳氧化硅（SiOC）作为锂的硫主体S系统具有出色的电化学性能。以1,3,5-三乙烯基-1,1,3,5,5-五甲基三硅氧烷（TPTS）为前驱体，通过800℃热解工艺合成了SiOC粉末。硫负载过程包括在 150 °C 下进行的熔融扩散过程，该过程成功地将硫扩散到 SiOC 多孔结构中。然后，通过多种技术对S-SiOC复合材料的形貌和结构进行了研究，证实了硫负载过程的有效性。_{S-SiOC复合正极提供了稳定的容量，在83.75 mA g s} ^-1的电流密度下循环50次后，可逆充电容量为711 mAh g s _-1 ^（约初始容量的50.3%）。（0.05C，考虑1C = 1675 mA g _s ^-1），表明该复合材料是一种有前途的Li S电池材料。