Kim Sungho, Cha Wangsoo, Ramadass Kavitha, Singh Gurwinder, Kim In Young, Vinu Ajayan
Global Innovative Center for Advanced Nanomaterials (GICAN) School of Engineering Faculty of Engineering and Built Environment, The University of Newcastle, Callaghan, NSW 2308, Australia.
Chem Asian J. 2020 Jun 17;15(12):1863-1868. doi: 10.1002/asia.202000349. Epub 2020 May 13.
Molybdenum disulfide (MoS ) is a promising candidate as a high-performing anode material for sodium-ion batteries (SIBs) due to its large interlayer spacing. However, it suffers from continued capacity fading. This problem could be overcome by hybridizing MoS with nanostructured carbon-based materials, but it is quite challenging. Herein, we demonstrate a single-step strategy for the preparation of MoS coupled with ordered mesoporous carbon nitride using a nanotemplating approach which involves the pyrolysis of phosphomolybdic acid hydrate (PMA), dithiooxamide (DTO) and 5-amino-1H-tetrazole (5-ATTZ) together in the porous channels of 3D mesoporous silica template. The sulfidation to MoS , polymerization to carbon nitride (CN) and their hybridization occur simultaneously within a mesoporous silica template during a calcination process. The CN/MoS hybrid prepared by this unique approach is highly pure and exhibits good crystallinity as well as delivers excellent performance for SIBs with specific capacities of 605 and 431 mAhg at current densities of 100 and 1000 mAg , respectively, for SIBs.
二硫化钼（MoS₂）因其较大的层间距，是一种很有前景的高性能钠离子电池（SIBs）负极材料。然而，它存在容量持续衰减的问题。将MoS₂与纳米结构的碳基材料复合可以克服这个问题，但这颇具挑战性。在此，我们展示了一种单步策略，通过纳米模板法制备与有序介孔氮化碳耦合的MoS₂，该方法涉及在三维介孔二氧化硅模板的多孔通道中同时热解水合磷钼酸（PMA）、二硫代草酰胺（DTO）和5-氨基-1H-四唑（5-ATTZ）。在煅烧过程中，MoS₂的硫化、氮化碳（CN）的聚合及其复合在介孔二氧化硅模板内同时发生。通过这种独特方法制备的CN/MoS₂复合材料纯度高、结晶性好，并且在SIBs中表现出优异的性能，在100和1000 mAg⁻¹的电流密度下，比容量分别为605和431 mAh g⁻¹。
