Molybdenum trioxide (MoO) is regarded as a promising material for rechargeable batteries attributed to its low cost, high theoretical capacity and eco-friendliness. Herein, N-doped carbon (NC) coated MoO/MoS composite decorated on MXene nanosheets (MoO/MoS/NC/MXene) has been synthesized by gas-phase vulcanization and coating of NC. The electrical conductivity and kinetics of ion diffusion/transport are greatly enhanced due to the vulcanization, NC coating and introduction of MXene. As a consequence, the composite exhibits high discharge capacity of 464 mAh/g at a current density of 0.1 A/g and still maintains a capacity of 202 mAh/g at a high current density of 5 A/g when used as the anode material for sodium-ion batteries. Furthermore, the electrode material still remains a high discharge capacity of 320 mAh/g with the capacity retention rate of nearly 100 % after 2000 cycles at a current density of 1 A/g.

中文翻译：

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N掺杂碳涂层MoO3/MoS2集成MXene纳米片具有钠离子电池的超长循环稳定性

三氧化钼（MoO）因其成本低、理论容量高和环境友好而被认为是一种有前途的可充电电池材料。在此，通过气相硫化和NC涂层合成了装饰在MXene纳米片上的N掺杂碳（NC）涂层MoO/MoS复合材料（MoO/MoS/NC/MXene）。由于硫化、NC涂层和MXene的引入，电导率和离子扩散/传输动力学大大增强。结果，该复合材料在0.1 A/g的电流密度下表现出464 mAh/g的高放电容量，并且当用作负极材料时在5 A/g的高电流密度下仍保持202 mAh/g的容量用于钠离子电池。此外，该电极材料在1 A/g电流密度下循环2000次后仍保持320 mAh/g的高放电容量，容量保持率接近100%。