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N-doped carbon coated MoO3/MoS2 integrated MXene nanosheets with ultra-long cycle stability for sodium-ion batteries
Applied Surface Science ( IF 6.3 ) Pub Date : 2024-01-03 , DOI: 10.1016/j.apsusc.2024.159294
Zhiqi Yu , Qian Wang , Kai Zhu , Guiling Wang , Dianxue Cao , Jun Yan

Molybdenum trioxide (MoO3) 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 MoO3/MoS2 composite decorated on MXene nanosheets (MoO3/MoS2/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:


用于钠离子电池的 N 掺杂碳涂层 MoO3/MoS2 集成 MXene 纳米片,具有超长循环稳定性



三氧化钼 (MoO3) 因其低成本、高理论容量和环保性而被认为是一种很有前途的可充电电池材料。本文通过气相硫化和NC涂层合成了修饰在MXene纳米片(MoO3/MoS2/NC/MXene)上的N掺杂碳(NC)涂层MoO3/MoS2复合材料。由于硫化、NC 涂层和 MXene 的引入,离子扩散/传输的电导率和动力学大大增强。因此,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,并且在 5 A/g 的高电流密度下仍保持 202 mAh/g 的容量作为钠离子电池的负极材料。此外,电极材料在 1 A/g 的电流密度下循环 2000 次后仍保持 320 mAh/g 的高放电容量,容量保持率接近 100%。
更新日期:2024-01-03
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