Hierarchically-porous carbon nano sheets were prepared as a conductive additive for sulfur/polyacrylonitrile (S/PAN) composite cathodes using a simple heat treatment. In this study, kombucha (that was derived from symbiotic culture of bacteria and yeast) carbon (KC) and graphene oxide (GO) were used as a carbon host matrix. These rational-designed S/PAN/KC/GO hybrid composites greatly suppress the diffusion of polysulfides by providing strong physical and chemical adsorption. The cathode delivered an initial discharge capacity of 1652 mAh·g−1 at a 0.1 C rate and a 100^th cycle capacity of 1193 mAh·g−1. The nano sheets with embedded hierarchical pores create a conductive network that provide effective electron transfer and fast electrochemical kinetics. Further, the nitrogen component of PAN can raise the affinity/interaction of the carbon host with lithium polysulfides, supporting the cyclic performance. The results exploit the cumulative contribution of both the conductive carbon matrix and PAN in the enhanced performance of the positive electrode.

使用简单的热处理，制备了用于硫/聚丙烯腈（S / PAN）复合阴极的导电添加剂的多层多孔碳纳米片。在这项研究中，康普茶（源自细菌和酵母的共生培养）的碳（KC）和氧化石墨烯（GO）被用作碳基质。这些合理设计的S / PAN / KC / GO杂化复合材料通过提供强大的物理和化学吸附，极大地抑制了多硫化物的扩散。阴极递送1652毫安时的初始放电容量·G-1以0.1C速率和100^个循环容量为1193 mAh·g-1。具有嵌入的分层孔的纳米片可创建导电网络，从而提供有效的电子转移和快速的电化学动力学。此外，PAN的氮成分可以提高碳主体与多硫化锂的亲和性/相互作用，从而支持循环性能。结果利用了导电碳基质和PAN在正极性能增强方面的累积贡献。