Much attention has been paid to lithium sulfur battery due to its high energy density. However, low S loading and poor cycling stability have hindered their commercialization. In this work, a porous carbon film with rich heteroatom doping was prepared from the hyphae film by freezing drying and high-temperature carbonization. Then the carbon film loaded polysulfide solution was utilized as a self-supporting cathode for Li-S batteries. The self-supporting cathode exhibited good rate performance (513.1 mAh/g at 1C) and improved cycling stability (more than 400 cycles) under a high current density (0.5C). This is mainly attributed to the abundant heteroatoms that provided active sites with superior adsorption ability for lithium polysulfide, which not only enhanced the cycling stability but also facilitated the conversion kinetics. Besides, the fibrous network morphology with affluent porous structures inherited from hyphae provided a large specific surface area and sufficient space for accommodating active substances. This work shows the great potential of hyphae derived porous carbon electrodes for high-performance energy storage applications.

中文翻译：

---

源自菌丝的杂原子掺杂碳膜作为先进锂硫电池的自支撑阴极

锂硫电池因其高能量密度而备受关注。然而，低硫负载量和较差的循环稳定性阻碍了它们的商业化。本工作以菌丝膜为原料，通过冷冻干燥和高温碳化制备了富含杂原子掺杂的多孔碳膜。然后将碳膜负载的多硫化物溶液用作Li-S电池的自支撑阴极。自支撑正极在高电流密度（0.5C）下表现出良好的倍率性能（513.1 mAh/g，1C）和改善的循环稳定性（超过400次循环）。这主要归因于丰富的杂原子为多硫化锂提供了具有优异吸附能力的活性位点，这不仅增强了循环稳定性，而且促进了转化动力学。此外，继承自菌丝的丰富多孔结构的纤维网络形态提供了较大的比表面积和足够的容纳活性物质的空间。这项工作显示了菌丝衍生的多孔碳电极在高性能储能应用中的巨大潜力。