The effects of different pretreatment methods on the microstructure and electrochemical properties of porous carbon materials are investigated by using mature loofah as carbon material source. Compared with the samples without pretreatment, the porous carbon material produced under the condition of sulfuric acid pretreatment has the largest specific surface area and the richest pore structure. The structure can quickly transform the long-chain polysulfide into the short-chain polysulfide, thus effectively fixing the polysulfide and blocking the shuttle effect. At 2C, the initial specific capacity of the battery is 772.8 mAh/g. And after 300 cycles, the capacity retention rate is 87.7 %. It has good rate performance. Therefore, the physical and electrochemical properties of biomass materials are significantly improved by the proper pretreatment process. The research shows that the low cost biomass carbon material has significant advantages as the cathode material of lithium sulfur battery through the simple and reasonable pretreatment.

中文翻译：

---

农业废弃物丝瓜络衍生的分级多孔碳：易于合成并作为锂硫电池中硫主体的应用

以成熟丝瓜络为碳材料源，研究不同预处理方法对多孔碳材料微观结构和电化学性能的影响。与未经预处理的样品相比，硫酸预处理条件下制备的多孔碳材料具有最大的比表面积和最丰富的孔结构。该结构能够快速将长链多硫化物转化为短链多硫化物，从而有效固定多硫化物并阻断穿梭效应。2C时，电池的初始比容量为772.8mAh/g。300次循环后，容量保持率为87.7%。它具有良好的倍率性能。因此，通过适当的预处理工艺可以显着改善生物质材料的物理和电化学性能。研究表明，通过简单合理的预处理，低成本的生物质炭材料作为锂硫电池正极材料具有显着的优势。