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MoS2 nanoplatelets scaffolded within CoS2 nanobundles as anode nanomaterials for sodium-ion batteries
Journal of Alloys and Compounds ( IF 6.2 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.jallcom.2020.156229
Yu Su , Chunxiao Wu , Hui Li , Feijiang Chen , Ying Guo , Lan Yang , Sailong Xu

Abstract The development of high-efficiency anode nanomaterials (such as MoS2) is critical to advancing sodium-ion batteries (SIBs) towards the practical application. Herein, MoS2 nanoplatelets well-confined within CoS2 nanobundles (MoS2/CoS2) are prepared as anode nanomaterials for SIBs. The MoS2/CoS2 composite is derived by the sulfidation of a guest/host precursor of PMo12O403− anion-intercalated Co(OH)2 via an interlayer nanoconfinement effect. Electrochemical testing demonstrates that the carbon-free MoS2/CoS2 composite exhibits a high capacity of 396.6 mA h g−1 after 80 cycles at 0.1 A g−1, and retains a decent reversible capacity of 203.8 mA h g−1 after 300 cycles at 0.5 A g−1. The result shows that our gest/host precursor-based synthesis strategy may open up an effective approach to prepare well-dispersed nanostructural composites for SIBs.

中文翻译:

支撑在 CoS2 纳米束内的 MoS2 纳米片作为钠离子电池的负极纳米材料

摘要 开发高效负极纳米材料(如 MoS2)对于推动钠离子电池(SIBs)走向实际应用至关重要。在此,制备了严格限制在 CoS2 纳米束(MoS2/CoS2)内的 MoS2 纳米片作为 SIB 的阳极纳米材料。MoS2/CoS2 复合材料是由 PMo12O4O3− 阴离子嵌入的 Co(OH)2 的客体/主体前体通过层间纳米限制效应硫化得到的。电化学测试表明,无碳的 MoS2/CoS2 复合材料在 0.1 A g-1 下 80 次循环后表现出 396.6 mA hg-1 的高容量,并在 0.5 A 下 300 次循环后保持了 203.8 mA hg-1 的可逆容量g-1。结果表明,我们基于 gest/host 前体的合成策略可能开辟了一种有效的方法来制备用于 SIB 的分散良好的纳米结构复合材料。
更新日期:2020-12-01
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