Lithium-sulfur (Li-S) battery has been considered a promising next-generation electrochemical energy storage device due to its high theoretical capacity and high energy density. However, the dissolution and shuttling problems of lithium polysulfides (LiPSs) are major obstacles hindering the performance and application of Li-S batteries. To address these issues, we report the rapid preparation of porous TiO₂ nanoparticles (p-TiO₂-NPs) as an effective sulfur host for Li-S batteries using a facile, scalable, and green one-step air oxidation strategy. Experimental results reveal that the p-TiO₂-NPs have a mesopores-rich structure and strong chemical adsorption capability against LiPSs, which effectively mitigates the dissolution and shuttling of LiPSs by way of physical and chemical adsorptions. Incorporating highly conductive multi-wall carbon nanotubes to interconnect with the active materials, the p-TiO₂-NPs-based cathode delivers a high discharge capacity of 1276 mAh g⁻¹ at 0.2 C and stable cycling performance with an ultralow capacity decay rate of 0.0526% per cycle at 1 C over 1200 cycles. This green and facile fabrication strategy can also be extended to other metal carbides to endow an environmentally friendly route for the sustainable development of high-performance Li-S batteries.

锂硫（Li-S）电池由于其高理论容量和高能量密度而被认为是有前途的下一代电化学储能设备。然而，多硫化锂（LiPS）的溶解和穿梭问题是阻碍Li-S电池性能和应用的主要障碍。为了解决这些问题，我们报告了快速制备多孔TiO ₂纳米粒子（p-TiO ₂ -NPs）的方法，它是一种简便，可扩展且绿色的一步式空气氧化策略，可作为Li-S电池的有效硫主体。实验结果表明，p-TiO ₂-NPs具有丰富的介孔结构和对LiPS的强大化学吸附能力，可通过物理和化学吸附有效地减轻LiPS的溶解和穿梭。结合高导电性的多壁碳纳米管与活性材料互连，基于p-TiO ₂ -NPs的阴极在0.2 C时可提供1276 mAh g ^-1的高放电容量，并具有稳定的循环性能和超低的电容衰减率。在1 C下超过1200个循环，每个循环的0.0526％。这种绿色且简便的制造策略还可以扩展到其他金属碳化物，从而为可持续发展高性能Li-S电池提供一条环保的途径。