Mateti Srikanth, Rahman Md Mokhlesur, Cizek Pavel, Chen Ying
Institute for Frontier Materials, Geelong Campus, Deakin University Waurn Ponds 3216 Victoria Australia
RSC Adv. 2020 Apr 14;10(22):12754-12758. doi: 10.1039/d0ra01503b. eCollection 2020 Mar 30.
A solvent-free, low-cost, high-yield and scalable single-step ball milling process is developed to construct 2D MoS/graphene hybrid electrodes for lithium-ion batteries. Electron microscopy investigation reveals that the obtained hybrid electrodes consist of numerous nanosheets of MoS and graphene which are randomly distributed. The MoS/graphene hybrid anodes exhibit excellent cycling stability with high reversible capacities (442 mA h g for MoS/graphene (40 h); 553 mA h g for MoS/graphene (20 h); 342 mA h g for MoS/graphene (10 h)) at a high current rate of 250 mA g after 100 cycles, whereas the pristine MoS electrode shows huge capacity fading with a retention of 37 mA h g at 250 mA g current after 100 cycles. The incorporation of graphene into MoS has an extraordinary effect on its electrochemical performance. This work emphasises the importance of the construction of the 2D MoS/graphene hybrid structure to prevent capacity fading issues with the MoS anode in lithium-ion batteries.
开发了一种无溶剂、低成本、高产率且可扩展的单步球磨工艺，用于构建用于锂离子电池的二维MoS/石墨烯复合电极。电子显微镜研究表明，所得复合电极由大量随机分布的MoS纳米片和石墨烯组成。MoS/石墨烯复合阳极在100次循环后，在250 mA g的高电流速率下表现出优异的循环稳定性和高可逆容量（MoS/石墨烯（40 h）为442 mA h g；MoS/石墨烯（20 h）为553 mA h g；MoS/石墨烯（10 h）为342 mA h g），而原始MoS电极在100次循环后，在250 mA g电流下容量大幅衰减，仅保留37 mA h g。将石墨烯掺入MoS对其电化学性能有非凡影响。这项工作强调了构建二维MoS/石墨烯复合结构对于防止锂离子电池中MoS阳极容量衰减问题的重要性。
