A nitrogen-phosphorus dual-doped auricularia auricula carbon (NP-AC) matrix was prepared through hydrothermal treatment using natural auricularia auricula as raw material and medium solution. Yeast was introduced and cultured by the auricularia auricula liquid medium. The NP-AC/S composite was prepared through further freeze-drying, carbonization, activation and compounding with sulfur procedures. The composition and microstructure of samples was characterized by X-ray diffraction (XRD), raman and X-ray photoelectron spectroscopy (XPS). The morphology was observed under scanning electron microscope (SEM) and transmission electron microscopy (TEM) method. The specific surface area was analyzed using nitrogen adsorption/desorption test. The weight ratio of sulfur was measured through thermogravimetric (TG) analysis. The original structure and composition of biomass were improved by yeast fermentation and the auricularia auricula block structure with low porosity was modified. The electrochemical performance of NP-AC/S composite in Li-S batteries was systematically explored. After 100 cycles at 0.2C current density, there was still nearly 1000 mAh g reversible capacity, holding a capacity retention rate of more than 84 %. The cycle performance and rate performance were both far better than the ordinary activated carbon materials.

中文翻译：

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酵母发酵制备NP双掺杂木耳碳宿主及其在锂硫电池中的应用

以天然木耳为原料和介质溶液，通过水热处理制备了氮磷双掺杂木耳碳（NP-AC）基质。将酵母引入木耳液体培养基中进行培养。通过进一步冷冻干燥、碳化、活化和与硫复合等步骤制备了NP-AC/S复合材料。通过X射线衍射(XRD)、拉曼光谱和X射线光电子能谱(XPS)对样品的成分和微观结构进行了表征。采用扫描电子显微镜（SEM）和透射电子显微镜（TEM）方法观察形貌。使用氮气吸附/解吸测试分析比表面积。通过热重(TG)分析测量硫的重量比。通过酵母发酵改善了生物质原有的结构和组成，修饰了低孔隙率的木耳块状结构。系统地探讨了 NP-AC/S 复合材料在 Li-S 电池中的电化学性能。在0.2C电流密度下循环100次后，仍有近1000 mAh g的可逆容量，容量保持率超过84%。循环性能和倍率性能均远优于普通活性炭材料。