ACS Appl Mater Interfaces. 2018 Apr 25;10(16):13406-13412. doi: 10.1021/acsami.7b18154. Epub 2018 Apr 10.
Free-standing paper cathodes with layer-by-layer structure are synthesized for high-loading lithium-sulfur (Li-S) battery. Sulfur is loaded in a three-dimensional (3D) interconnected nitrogen-doped carbon nanofiber (CNF) framework impregnated with MnO nanoparticles. The 3D interconnected CNF framework creates an architecture with outstanding mechanical properties. Synergetic effects generated from physical and chemical entrapment could effectively suppress the dissolution and diffusion of the polysulfides. Electrochemical measurements suggest that the rationally designed structure endows the electrode with high utilization of sulfur and good cycle performance. Specifically, the cathode with a high areal sulfur loading of 11 mg cm exhibits a reversible areal capacity over 8 mAh cm. The fabrication procedure is of low cost and readily scalable. We believe that this work will provide a promising choice for potential practical applications.
用于高负载锂硫（Li-S）电池的独立式层层结构纸状阴极的合成。硫装载在三维（3D）相互连接的氮掺杂碳纳米纤维（CNF）框架中，该框架浸渍有 MnO 纳米颗粒。3D 相互连接的 CNF 框架创造了具有出色机械性能的结构。物理和化学固定化产生的协同效应可以有效地抑制多硫化物的溶解和扩散。电化学测量表明，合理设计的结构赋予了电极高的硫利用率和良好的循环性能。具体而言，具有 11mgcm 的高面载硫量的阴极表现出超过 8mAhcm 的可逆面容量。制造工艺成本低且易于扩展。我们相信这项工作将为潜在的实际应用提供有前途的选择。
