Khossossi Nabil, Lemaalem Mohammed, Zafer Talha, Mahmoud Abdelfattah, Dey Poulumi
Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands.
Department of Chemical Engineering, University of Illinois Chicago, Chicago, Illinois 60608, United States.
ACS Appl Mater Interfaces. 2025 Jan 8;17(1):930-942. doi: 10.1021/acsami.4c15372. Epub 2024 Dec 16.
Rechargeable lithium-sulfur batteries (LiSBs) assembled with earth-abundant and safe Li anodes are less prone to form dendrites on the surface, and sulfur-containing cathodes offer considerable potential for achieving high energy densities. Nevertheless, suitable sulfur host materials and their interaction with electrolytes are at present key factors that retard the commercial introduction of these batteries. Here we propose a two-dimensional metallic carbon phosphorus framework, namely, 2D CP, as a promising sulfur host material for inhibiting the shuttle effect and improving electronic conductivity in high-performance Li-S batteries. The good electrical conductivity of CP eliminates the insulating nature of most sulfur-based electrodes. The dissolution of lithium polysulfides (LiPSs) into the electrolyte is largely prevented by the strong interaction between CP and LiPSs. In addition, the deposition of LiS on CP facilitates the kinetics of the LiPS redox reaction. Therefore, the use of CP for Li-S battery cathodes is expected to suppress the LiPS shuttle effect and to improve the overall performance, which is ideal for the practical application of Li-S batteries.
采用储量丰富且安全的锂阳极组装的可充电锂硫电池（LiSBs）在表面形成枝晶的倾向较小，含硫阴极在实现高能量密度方面具有相当大的潜力。然而，合适的硫主体材料及其与电解质的相互作用目前是阻碍这些电池商业化推广的关键因素。在此，我们提出一种二维金属碳磷框架，即二维CP，作为一种有前景的硫主体材料，用于抑制高性能锂硫电池中的穿梭效应并提高电子导电性。CP良好的导电性消除了大多数硫基电极的绝缘特性。CP与多硫化锂（LiPSs）之间的强相互作用在很大程度上阻止了LiPSs溶解到电解质中。此外，LiS在CP上的沉积促进了LiPS氧化还原反应的动力学。因此，将CP用于锂硫电池阴极有望抑制LiPS穿梭效应并提高整体性能，这对于锂硫电池的实际应用来说是理想的。
